Bumps package.json, .claude-plugin/plugin.json and the README badge to
7.8.2; adds the release entry to CHANGELOG.md, docs/version-history.md,
the README recent-versions table and the CLAUDE.md highlights block.
Also fixes test pollution introduced with the ide-extension regression
suite: its temp roots used an `llmsec-jb-plugin-` prefix, and
jetbrains-parser.test.mjs asserts globally that no `llmsec-jb-*`
directory survives anywhere in tmpdir. The shared prefix made that
assertion fail depending on test order — it passed on the first full run
and failed on the next. Prefix is now `llmsec-nullmanifest-`.
npm test: 1901/1901 green, three consecutive runs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
probe-rm.mjs was self-labelled "Temporary probe — delete after
debugging". It is not a test (no node:test harness, no assertions — it
prints exit codes), it ran against a hardcoded absolute path into the
INSTALLED marketplace copy rather than this repo, and it exercised the
rm-block cases that are now covered properly by
tests/hooks/pre-bash-destructive.test.mjs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
decodeEntities guarded parseInt with Number.isFinite, which bounds
nothing: any numeric character reference above 0x10FFFF produced a
finite integer that String.fromCodePoint rejects with RangeError.
Correction to the review's framing: this does NOT break parsePluginXml's
no-throw contract. The per-field safe() wrapper catches it. The actual
defect is quieter — the affected field is discarded and replaced with
'', with only a warning. A plugin whose <name> carries one out-of-range
reference parses as name: "" while pluginId and every other field
survive, so name-based checks (JetBrains typosquat detection against the
top-plugin list) run against an empty string.
Severity is below the HIGH it was filed as: a document containing a code
point above 0x10FFFF is not well-formed XML, so IntelliJ would reject
such a plugin too — the evasion yields a plugin that does not load. The
fix is still correct and one line of logic.
- isDecodableCodePoint(): integer, >= 0, <= 0x10FFFF.
- Undecodable references are now left literal, matching how lenient
parsers treat unrecognised entities and how this same function already
treats unknown named entities.
Regression test drives parsePluginXml with hex and decimal references
just past and far past the maximum, asserts the no-throw contract still
holds, and pins that valid references, the maximum valid code point, and
named entities still decode.
npm test: 1901/1901 green (1890 + 11 new).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
stripInjection is the remote-scan indirection layer: its `sanitized`
output is what an LLM agent actually reads, verbatim, via
sanitized_content in the evidence package. It scanned two variants of
each file — the raw text and normalizeForScan(text) — but removed
matches with `sanitized.replace(match[0], ...)` against the RAW text
only.
For a match found in the decoded variant, match[0] IS the decoded
string, which by construction does not occur in the raw text. The
replace was therefore a silent no-op: the finding was reported while the
encoded payload was passed to the agent untouched. Every obfuscation the
normalizer exists to defeat — HTML entities, URL encoding, \u escapes,
hex, base64, letter-spacing, Unicode tags — reached the agent intact.
The worst case is the intended one: detection said "critical injection
found" and shipped the injection along with the verdict.
- Pass 1 redacts the whole source LINE whose own normalized form carries
the pattern. Line granularity is deliberate: decoding is not
length-preserving, so decoded match offsets cannot be mapped back onto
the original text.
- Pass 2 keeps the existing literal replacement and finding collection.
- Residual gap, made explicit rather than silent: a payload encoded
across MULTIPLE lines matches whole-text normalization but no single
line, so it cannot be attributed. Those findings now carry
`unstripped: true`. Whole-file redaction was considered and rejected —
normalizeForScan base64-decodes any long blob, so a benign asset could
blank an entire file's evidence.
- stripInjection exported via __testing, and main() is now behind the
standard isMain guard (copied from dashboard-aggregator.mjs) so
importing the module does not execute the CLI. CLI verified unchanged
against the evil-project-health fixture: 7 files, 6 injection
findings, risk_level critical.
This boundary had no direct test coverage before this commit.
npm test: 1890/1890 green (1884 + 6 new).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
The two manifest parsers disagree on how they signal failure:
parseVSCodeExtension returns a bare null, parseIntelliJPlugin returns a
TRUTHY { manifest: null, warnings }. scanOneExtension guarded only the
bare-null form, so every JetBrains failure path — lib/ missing, lib/ not
a directory, lib/ unreadable, no jars in lib/, no jar extractable — fell
through the guard and dereferenced `manifest.hasSignature`.
The resulting TypeError propagated out of scanOneExtension into
mapConcurrent, which awaited fn() with no per-item try/catch, so
Promise.all rejected and the ENTIRE ide-scan aborted. One malformed
plugin directory on disk was enough to take down the scan of every
other installed extension — including, in an audit context, a plugin
that is malformed precisely because it is hostile.
- scanOneExtension: guard is now `!parsed || !parsed.manifest`, and the
parser's own warnings are carried into the result so the reason for
the skip survives instead of being replaced by a generic message.
- unscannableExtension(): the result envelope is extracted so the early
return and the isolation belt below produce the same shape.
- Belt (defense-in-depth): the scanOneExtension call site catches per
extension and yields an unscannable result. mapConcurrent stays
generic — the isolation lives at the call site, not in the helper.
Regression test drives scanOneExtension across all four JetBrains parse
failure paths plus a no-invented-findings assertion.
npm test: 1884/1884 green (1879 + 5 new).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
Rule 4 in isFalsePositive ("test/fixture files intentionally contain
example secrets") matched /(test|spec|fixture|mock|__test__|__spec__)/i
against absPath — the ABSOLUTE path. Any directory name above the scan
root therefore silenced every entropy finding in the entire target: a
repo cloned to a CI workspace, checked out under a parent folder named
`testing`, or scanned from any path with one of those substrings
reported zero secrets and still exited status 'ok'. The failure is
silent — indistinguishable from a clean scan.
- isFalsePositive takes relPath and rule 4 keys off it. relPath was
already computed and passed down to scanFileContent; only the
suppression check was reading the wrong one.
- classifyFileContext keeps using absPath: it reads the basename
extension only, so directory names above the root cannot affect it.
- Rules 1-3 and 5-13 are untouched.
Regression test drives scan() end-to-end against temp roots named
llmsec-test-*, llmsec-spec-*, llmsec-fixture-* and llmsec-mock-*, with a
neutral-root control proving the payload is detectable, plus two
guards that genuine suppression still works (a *.test.mjs file and a
file under a relative tests/ directory).
npm test: 1879/1879 green (1872 + 7 new).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
The BLOCK rule named "Filesystem root destruction" did not block the bare
root target it is named for. The target alternation ended in a shared `\b`,
and a word boundary cannot hold after `/` or `~` at end-of-command.
Measured against the shipped pattern:
bare `/` target NOT blocked `$HOME` target blocked
bare `~` target NOT blocked `/usr` target blocked
`/*` glob target NOT blocked
swapped flags (-fr) NOT blocked
sudo-prefixed NOT blocked
Only targets whose first character is a word character ever satisfied the
assertion, so the rule caught `/etc` but not bare root. These fell through
to WARN (exit 0) — advisory only, command executed.
- Pattern: `\b` moved onto the `$HOME` alternative alone, where it is
meaningful (it ends in a word char, so `$HOMEDIR` is still not
swallowed). Dropped from `/` and `~`. Nothing else changes: `/etc`,
`/home`, `./build` behave exactly as before.
- The old test file encoded this defect as expected behaviour, with a NOTE
claiming the pattern "requires separate flag groups (e.g. -f -r, not -rf
combined)". That diagnosis was wrong — the `/etc` case blocks fine with
merged flags. Comment replaced with the real root cause.
npm test: 1872/1872 green (1865 + 7 new).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
validateContent() syntax-checked .mjs/.js/.cjs candidates via
execSync(`node --check "${tmpPath}"`), where tmpPath derives from the
untrusted scanned-repo FILENAME. The F-2 guard checks path containment
but never quotes or strips shell metacharacters, so a file named
`x";<cmd>;".mjs` in a scanned repo turned `/security clean` (live is the
documented default) into arbitrary command execution. Verified with a
live PoC before the fix.
- validateContent: spawnSync('node', ['--check', tmpPath]) — no shell.
- CLI orchestrator fallback: same treatment (argv array, explicit
status/error handling instead of execSync's throw-on-nonzero).
- Belt (defense-in-depth): applyFixes now refuses findings whose `file`
carries shell or control metacharacters, reported as skipped.
- Regression tests cover both layers separately, so the belt cannot mask
a re-introduced shell in the sink.
node --test: 1865/1865 green (1863 + 2 new).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TcQyMTQfyrsAapaCMPxTtQ
Session B of the security-fix track. Both sinks trusted untrusted strings at a
filesystem/subprocess boundary; same fix family as F-1.
F-2 (HIGH, arbitrary file write) — scanners/auto-cleaner.mjs: applyFixes() did
resolve(targetPath, f.file) with no containment, then wrote the cleaned content
back. f.file is untrusted (scanned-repo filenames, or a fully attacker-chosen
--findings file), so file: "../../.claude/settings.json" let the cleaner modify
files OUTSIDE the scanned tree. Add a prefix-containment check before grouping:
absPath must equal targetPath or start with targetPath + sep, else the finding
is refused and reported as skipped. (Documented residual gap: prefix containment
does not stop a symlink inside the tree pointing out — noted inline.)
F-3 (HIGH, command injection, pre-confirmation) — hooks/scripts/
pre-install-supply-chain.mjs: inspectNpmPackage ran execSafe(`npm view ${spec}
--json`), a shell string. spec derives from package tokens parsed out of the
scanned Bash command, so a metachar-bearing token reached the shell on
PreToolUse(Bash) — BEFORE the install, so it ran even if the user then denied
the command. Switch to spawnSync('npm', ['view', spec, '--json']) (no shell);
spec is passed as one argv element. The static `npm audit --json` execSafe call
is left as-is (no interpolation).
TDD (repro -> red -> green):
- tests/scanners/auto-cleaner-traversal.test.mjs: a "../secret.txt" finding must
not rewrite the outside file; contained files still get cleaned.
- tests/hooks/supply-chain-injection.test.mjs: `npm install $(>/abs/PWNED)`
(redirect-only $(...) survives normalizeBashExpansion + the whitespace split)
must not create the sentinel.
Closing gates: full node --test suite 1863/0 (was 1860; +3); gitleaks clean;
F-1 regression re-run GREEN (sink still closed).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V3s6WnubSSrFjAQTLQdVbG
git-forensics ran execSync(`git ${cmd}`), interpolating attacker-controlled
filenames from the SCANNED repo (git ls-files / git log --name-only) into a
shell string. A hostile repo containing a file named `commands/$(touch X).md`
achieved zero-interaction RCE on `/security scan <url>`: gitScan is in the
default scanner array and runs OUTSIDE the git-clone OS sandbox (which wraps
only the clone), so it executed unsandboxed on all platforms.
Convert the git() helper to spawnSync('git', [...args]) with no shell; every
call site now passes discrete tokens (shell quoting removed — git does its own
pathspec globbing). The helper throws on non-zero exit, preserving existing
per-category/per-file try/catch semantics.
TDD: adds a failing-first regression (tests/scanners/git-injection.test.mjs)
that builds a hostile-filename fixture repo and asserts the injected command
never runs. RED against execSync, GREEN after the fix.
Also removes two stray committed root artifacts (F-5/F-6): `--json`
(0-byte redirect husk) and .orphaned_at.
Closing gates: full node --test suite 1860/0; gitleaks clean. F-2/F-3 follow
in Session B.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V3s6WnubSSrFjAQTLQdVbG
Three new files in tests/e2e/ (45 tests, 1777 -> 1822):
- attack-chain.test.mjs (17): full hook stack against attack payloads in
sequence -- prompt injection at the gate; T1/T5/T8 bash evasions;
pathguard on .env / .ssh; secrets hook on AWS-shaped keys and PEM
headers; markdown link-title and HTML-comment poisoning in tool
output; trifecta accumulation over a single session with dedup on
the next benign call.
- multi-session.test.mjs (9): state persistence across simulated
session boundaries. Uses the fact that a hook child's process.ppid
equals the test runner's process.pid, so writing the session state
file directly simulates "previous session" history. Covers slow-burn
trifecta (legs spread >50 calls), MCP cumulative description drift
via LLM_SECURITY_MCP_CACHE_FILE override, and pre-compact transcript
poisoning in warn / block / clean / missing-file modes.
- scan-pipeline.test.mjs (19): scan-orchestrator + all 10 scanners +
toxic-flow correlator against poisoned-project (BLOCK / 95 / Extreme)
and grade-a-project (WARNING / 48 / High). Asserts envelope shape,
verdict, risk_score, severity counts, OWASP coverage, scanner
enumeration, and a narrative-coherence cross-check that the BLOCK
scan strictly outranks the WARNING scan along every axis.
Test files build credential-shaped payloads at runtime via concatenation
so they contain no literal matches for the pre-edit-secrets regexes
(memory rule feedback_secrets_hook_test_fixtures.md).
Doc updates in same commit per marketplace policy:
- CLAUDE.md header: 1777+ -> 1822+ tests, mentions tests/e2e/
- README.md badge tests-1777 -> tests-1822, body text updated
- CHANGELOG.md: new [Unreleased] Added section describing scope
No version bump. No behavior changes outside tests/.
No behavior changes. Sets the public stance, tightens documentation, and
removes coherence drift so anyone forking or downloading the plugin gets
a consistent starting point.
Added:
- CONTRIBUTING.md — public fork-and-own guide. Why PRs are not accepted,
how to fork well, what is welcome via issues.
- README "Project scope" section — out-of-scope table naming what is
fork-and-own territory (web dashboard, fleet policy, runtime firewall,
IDE LSP, compliance pack, ticketing, multi-tenancy, ML detectors,
marketplace UI, SSO/SCIM/RBAC) with commercial alternatives.
- package.json: bugs.url, CONTRIBUTING/SECURITY/CHANGELOG in files
whitelist for npm publishing.
Changed:
- SECURITY.md rewritten. Supported-versions table from stale 5.1.x to
current reality (7.3.x active, 7.0-7.2 best-effort, <7.0 EOL).
Best-effort solo response timeline. Scope expanded to bin/.
- Scanner VERSION constants synced to plugin version. Was 6.0.0 in
dashboard-aggregator and posture-scanner.
- package.json repository.url corrected from fromaitochitta/ to open/.
- README "Feedback & contributing" links to CONTRIBUTING.md.
Fixed:
- pre-compact-scan size-cap timing test ceiling raised 500ms -> 1000ms.
Was a flake on Intel Mac and CI under load. Design target unchanged
(<500ms, documented in CLAUDE.md).
Notes:
- First patch on the stabilization line (post-2026-05-01).
- Wave E attack-simulator scenarios deferred indefinitely; coverage
remains at 72.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Wave C step C3: closes E14 with the user-facing reset command.
After a legitimate MCP server upgrade the sticky baseline (added in C1)
becomes a stale "what the tool used to say" anchor and every subsequent
post-mcp-verify advisory will re-flag the change. /security mcp-baseline-reset
lets the user acknowledge the upgrade so the next call seeds a fresh
baseline.
New files:
- scanners/mcp-baseline-reset.mjs — small CLI wrapper around clearBaseline /
listBaselines. Modes: --list (read-only), --target <name>, no-args (all).
Outputs JSON summary on stdout. Exit 0 always (idempotent).
- commands/mcp-baseline-reset.md — dispatcher following mcp-inspect.md
shape. Frontmatter: name=security:mcp-baseline-reset, sonnet model,
Read/Bash/AskUserQuestion tools. 4-step body (list -> confirm scope
-> execute -> confirm result).
- tests/scanners/mcp-baseline-reset.test.mjs — 10 CLI tests across
--list, --target, clear-all, idempotency, history preservation, and
bare-positional sugar.
Updated:
- commands/security.md — new row in commands table after mcp-inspect.
- CLAUDE.md — new commands-table row + new v7.3.0 narrative section
describing the baseline schema, cumulative-drift detection, reset
semantics, and the LLM_SECURITY_MCP_CACHE_FILE override.
- Plugin README.md — new MCP-baseline-reset row in commands table,
scanner count 12 standalone -> 13 standalone, new "MCP Description
Drift (E14, v7.3.0)" subsection explaining the sticky baseline,
cumulative threshold, reset semantics, and env-var override.
- Root marketplace README.md — scanner count 22 -> 23 (10 orchestrated +
13 standalone), command count 19 -> 20, test count 1511 -> 1768.
Wave C complete: 1738 -> 1768 tests (+30 across C1/C2/C3). Per plan,
Wave C does NOT bump the plugin version — that lands at the wave-bundle
release. The advisory text in post-mcp-verify already references the
new command path so the user has a ready remediation step.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Wave C step C2: surface the cumulative-drift signal from
checkDescriptionDrift() (added in C1) as a separate MEDIUM advisory
with finding category mcp-cumulative-drift. Independent of the existing
per-update drift advisory — a slow-burn rug-pull that keeps each update
below the 10% per-update threshold but cumulatively drifts >=25% from
the sticky baseline now triggers the new advisory without ever crossing
the per-update bar.
The advisory references /security mcp-baseline-reset (added in C3) so
the user knows how to acknowledge a legitimate MCP server upgrade.
CLAUDE.md updates:
- post-mcp-verify hooks-table row mentions per-update + cumulative drift
- mcp-description-cache lib bullet documents baseline schema, history,
cumulative threshold policy key, and LLM_SECURITY_MCP_CACHE_FILE
override.
Tests: 2 new hook tests using LLM_SECURITY_MCP_CACHE_FILE for cache
isolation. Existing 68 still pass; total 70.
Plugin README and root marketplace README updates land in C3 alongside
the new /security mcp-baseline-reset slash command (combined Wave-C
doc update per plan §"Wave C — Touch" list).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Wave C step C1: extend the MCP description cache schema with a sticky
baseline slot per tool and a rolling history array (last 10 drift events).
Cumulative drift = levenshtein(current, baseline) / max(|current|, |baseline|);
emits a separate signal when ratio >= mcp.cumulative_drift_threshold
(default 0.25). Per-update drift logic and threshold unchanged.
- loadCache(): TTL purge now skips entries with a baseline, preserving
cumulative-drift detection across the 7-day window. v7.2.0 entries
(no history field) are migrated on read by seeding baseline from the
current description and adding an empty history array. Entries with
history but no baseline (post-clearBaseline) are NOT re-seeded.
- checkDescriptionDrift(): when an entry exists with history but no
baseline (i.e. baseline was cleared), the next call re-seeds baseline
from the incoming description so the legitimate next version becomes
the new baseline.
- clearBaseline(toolName?): removes baseline for one tool or all tools.
Preserves description / firstSeen / lastSeen / history.
- listBaselines(): read-only listing for the upcoming reset CLI.
- LLM_SECURITY_MCP_CACHE_FILE env var override for end-to-end testing.
- New policy key mcp.cumulative_drift_threshold (default 0.25).
Tests: 23 new unit tests; existing 10 still pass.
Docs deferred: CLAUDE.md update lands in C3 alongside the new
/security mcp-baseline-reset command. C2 adds the hooks-table footer
note. Combined wave docs match plan §"Wave C — Touch" list.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Closes E11. Three new pieces, plus integration:
1. Re-interpolation detector (Appsmith GHSL-2024-277 stealth pattern).
The scanner now collects env: bindings (key -> source-expression
text) by walking parsed events whose parentChain includes 'env',
then for each `${{ env.<KEY> }}` inside run:, re-injects MEDIUM
if the binding source matches the 23-field blacklist. This
catches the pattern where developers apply env-indirection but
then re-interpolate the env var in run:, which cancels the
mitigation (template substitution happens before shell parsing).
2. Auth-bypass category (Synacktiv 2023 Dependabot spoofing).
Detects `if: ${{ github.actor == 'dependabot[bot]' }}` and
variants. MEDIUM, owasp: 'LLM06' (Excessive Agency). Distinct
from injection — same expression syntax, different threat class.
Recommendation steers users to `github.event.pull_request.user.login`.
3. severity.mjs OWASP map registration. WFL prefix added to all
four maps:
- OWASP_MAP['WFL'] = ['LLM02', 'LLM06']
- OWASP_AGENTIC_MAP['WFL'] = ['ASI04']
- OWASP_SKILLS_MAP['WFL'] = []
- OWASP_MCP_MAP['WFL'] = []
Empty arrays for skills/MCP are explicit, not omitted — keeps
`Object.keys(OWASP_MAP)` symmetric across maps.
4. scan-orchestrator.mjs registration. workflowScan added between
supply-chain and toxic-flow (toxic-flow correlates after primaries).
Verified via integration: orchestrator emits 9 WFL findings on
tests/fixtures/workflows/.
Bug fix: extractTriggers in workflow-yaml-state.mjs was collecting
sub-properties (`branches:`, `types:`) as triggers. Now tracks the
first nested indent level and ignores anything deeper.
Tests:
- 6 new cases in tests/scanners/workflow-scanner.test.mjs:
re-interp TP, no-double-count, auth-bypass TP, auth-bypass FP
(startsWith head_ref is not auth-bypass), OWASP map shape,
orchestrator import + SCANNERS array entry.
- 2 new fixtures: tp-reinterpolation.yml, auth-bypass-dependabot.yml.
- Existing 14 scanner tests + 15 state-machine tests unchanged.
Test count: 1732 -> 1738 (+6). Wave B total: +53 over baseline 1685.
Pre-compact-scan flake unchanged (passes in isolation).
Adds a scope-hopping detector to the npm install gate. When a user
installs `@<scope>/<unscoped>`, the hook now emits a MEDIUM warning
on stderr (exit 0, never blocks) if:
- `<unscoped>` matches a popular npm package (POPULAR_NPM, ~80
names from knowledge/top-packages.json), AND
- `<scope>` is not on NPM_OFFICIAL_SCOPES (built-in 22 entries) or
on policy.json `supply_chain.allowed_scopes`.
Why: an attacker publishing `@evilcorp/lodash` cannot squat the bare
`lodash` name, but they can register an unrelated scope and rely on
typo or copy-paste to trick installs. NPM_OFFICIAL_SCOPES anchors the
known-good scopes (@types, @reduxjs, @nestjs, …) so legitimate
installs stay silent.
Implementation:
- `scanners/lib/supply-chain-data.mjs`: exports POPULAR_NPM,
NPM_OFFICIAL_SCOPES, and `checkScopeHop(name, extraAllowedScopes)` —
pure function, no policy/network dependency, fully unit-testable.
- `knowledge/typosquat-allowlist.json`: mirrors NPM_OFFICIAL_SCOPES as
`npm_official_scopes`. A doc-consistency assertion ensures the two
lists never drift.
- `hooks/scripts/pre-install-supply-chain.mjs`: imports checkScopeHop,
reads `supply_chain.allowed_scopes` from policy, and pushes a
warning before existing compromised/audit checks.
Tests:
- 9 new cases in tests/hooks/pre-install-supply-chain.test.mjs:
TP @evilcorp/lodash, TP @attacker/express, allowlist @types,
allowlist @reduxjs, allowlist @modelcontextprotocol, FP unscoped
name not in top-100, bare unscoped name, policy override, defensive
non-string input, NPM_OFFICIAL_SCOPES <-> typosquat-allowlist.json
consistency.
Adds scanGitAttributes(repoDir) — pure function that parses
.gitattributes after a sandboxed clone and returns the
{filter,diff,merge} driver entries that would run on checkout. The
clone CLI prints each entry as a "MEDIUM" stderr advisory followed by
a recommendation to verify the smudge/clean command before moving the
clone outside the sandbox.
Why: filter drivers execute arbitrary shell during checkout (smudge
runs on read, clean on write). Even with the existing sandboxed clone,
downstream consumers that re-checkout files outside the sandbox can be
exploited. Surfacing the directive list lets the caller decide whether
to proceed.
Out-of-scope: in-line content of the smudge command is not analysed —
the advisory is for human review, not automatic blocking.
Tests:
- tests/lib/git-clone-gitattributes.test.mjs (8 cases): LFS-style,
custom driver, missing/empty/comment-only files, line-number
tracking, inline-comment stripping, unreadable path graceful return.
Adds rot13 to the variantSet built in scanForInjection(), so
imperative phrases hidden as rot13 inside code comments still hit
the existing CRITICAL/HIGH/MEDIUM pattern arrays.
normalizeForScan() already covers base64, hex, URL, and HTML decoding
in a 3-iteration loop — those are NOT duplicated here. rot13 is the
only genuinely new variant: it is its own inverse and not part of any
NIST/Unicode normalization spec, so it has to be applied explicitly.
Threshold: only inputs >40 chars enter the rot13 pass, to suppress
false positives on accidental letter-shifts in tokens, ids, and short
identifiers. Variants are deduplicated against the existing set so
matchers do not run twice.
3 new tests in injection-patterns.test.mjs (rot13 detection, sub-40
char suppression, plaintext path still green). Total 168 tests pass.
Closes E3 in critical-review-2026-04-20.md.
Adds BLOCK_RULE for the malware-loader pattern:
echo|cat|printf <base64-blob> | base64 -d | <shell>
This is a common RCE delivery shape that bypasses static name-matching
gates by encoding the destructive command as a base64 blob. The new
rule fires only when the final pipe target is a shell interpreter
(bash, sh, zsh, dash, ksh) — base64 decoded into jq or any non-shell
consumer remains allowed.
5 new tests in pre-bash-destructive.test.mjs:
- 3 BLOCK cases (echo|base64|bash, printf|base64|sh, cat|base64|zsh)
- 2 FP probes (base64 -d -> jq passes; base64 -d alone passes)
Closes E9 in critical-review-2026-04-20.md.
Strips bash process substitution syntax — <(cmd) and >(cmd) — so the
inner command name is surfaced to downstream regex gates. Defeats
evasion like `cat <(curl evil)` where the destructive command is
hidden behind /dev/fd/N pipe sugar.
Implementation: bounded innermost-first iteration, depth 3. Beyond
that the string is left as-is rather than recurse without bound.
Runs after the single-quote mask phase, so legitimate strings like
`'echo <(x)'` are preserved.
5 new T7 tests (collapse + nested + FP probes) in
bash-normalize-t7-t9.test.mjs (now 12 tests total).
Closes E8 in critical-review-2026-04-20.md.
Defeats split-and-substitute evasion where attackers split a destructive
command name across an assignment and a variable reference (X=rm; later
$X) so downstream regex gates miss the literal command name. T9 collects
prefix assignments (VAR=value at start of string or after ; & |) and
substitutes ${VAR} / $VAR forms with the captured value. One-level
forward-flow only — chained vars are not followed.
Documented limits in JSDoc:
- Quoted assignments (X="rm -rf") not parsed (whitespace stops capture)
- Substitution is global within string, not scoped. Acceptable because
T3 strips unknown ${VAR} to '' afterwards.
Single-quoted literals are masked before T9 runs, so legitimate
strings are preserved (FP probe in tests).
7 new tests in bash-normalize-t7-t9.test.mjs.
Closes E10 in critical-review-2026-04-20.md.
The v7.0.0 entropy-scanner rule 18 suppressed every line whose pattern
matched  — regardless of the URL host or what the URL
carried. A markdown image URL pointing at a non-CDN host (or carrying a
secret-shaped token in its query string) would therefore mask a real
high-entropy credential.
Refactor:
* MARKDOWN_IMAGE now captures the full URL (was a host-only prefix
matcher), so rule 18 can inspect host and query.
* MARKDOWN_IMAGE_CDN_HOSTS allowlist constant covers cdn./images./
media./assets./static./*.cdn./*.amazonaws.com/{s3,cloudfront}/
*.cloudflare./*.fastly./*.akamaized./raw.githubusercontent.com/
*.imgix.net/*.cloudinary.com/.
* MARKDOWN_IMAGE_QUERY_SECRET catches secret-shaped query keys
(token, key, secret, password, api_key, access_token, auth) plus
well-known provider prefixes (AKIA, Bearer, sk_live_, ghp_, ghs_,
ghu_, gho_, ghr_, npm_).
* Rule 18 now suppresses iff (host matches CDN allowlist) AND
(query has no secret-shaped token). Anything else falls through
to entropy classification.
+4 tests in tests/scanners/entropy-context.test.mjs (29 → 33).
Existing rule 18 fixture (cdn.example.com, no secret query) still
suppresses, so no regression on the legitimate path.
Refs: Batch B Wave 5 / Step 13 / v7.2.0
critical-review-2026-04-20.md §E18
The v7.0.0 entropy-scanner ran rules 11-13 (GLSL/CSS-in-JS/inline-markup
line-proximity suppressions) for every line regardless of file type. A
polyglot `.ts` file with an embedded fragment-shader template literal
could therefore mask a real high-entropy credential when the credential
literal happened to share a line with a GLSL keyword. Critical-review
B5 documented the false-negative class.
Refactor:
* New `classifyFileContext(absPath, lines)` returns
`'shader-dominant' | 'markup-dominant' | 'code-dominant' | 'mixed'`,
keyed off file extension with a content-density fallback for
code-extension files (≥50% of sampled non-blank lines matching
GLSL/inline-markup → downgrade to `mixed`).
* `isFalsePositive(str, line, absPath, context)` gates rules 11-13
on `context !== 'code-dominant'`. Rules 1-10 and 14-19 still run
unconditionally, so URL/path/test-fixture/ffmpeg/UA/SQL/error-
template suppression behaves identically.
* `scanFileContent` computes `fileContext` once per file and threads
it through every per-string suppression check.
Conservative defaults to keep the regression surface minimal:
* Files with `<5` sampled non-blank lines fall back to `mixed`
(preserves the existing rule-11/12/13 behaviour for the single-
line .js fixtures used by entropy-context.test.mjs).
* Unknown extensions fall back to `mixed`.
* Code-extension files densely populated with shader/markup
content fall back to `mixed`.
Net effect: a `.ts` file with an embedded GLSL block but mostly TS
code on the surrounding lines now surfaces credentials that the
v7.0.0 line-proximity heuristic suppressed. Pure shader/markup
files are unaffected (extension skip / mixed default).
New fixture: tests/fixtures/entropy/polyglot-ts-with-glsl.ts (with
runtime placeholder so it does not commit a high-entropy literal).
+3 tests in tests/scanners/entropy-context.test.mjs (26 → 29).
Existing entropy.test.mjs and entropy-context.test.mjs all remain
green. Full suite 1658 → 1661.
Refs: Batch B Wave 5 / Step 12 / v7.2.0
critical-review-2026-04-20.md §B5
The existing CRITICAL pattern in injection-patterns.mjs only fires when
a comment body contains AGENT/AI/HIDDEN markers. Adversaries can drop
the marker and still hide instructions inside <!-- ... --> for any
agent that reads page source. This generalizes the comment scan: every
comment body is HTML-entity-decoded and run through the full
injection rule set. The existing keyword-restricted pattern still
fires (defense-in-depth).
Emits at the strongest tier with category html-comment-injection.
+3 tests (65 → 68).
Refs: Batch B Wave 4 / Step 11 / v7.2.0
SVG containers carry text that is invisible in the rendered image but
fully parsed by an agent reading the source. <desc>, <title>,
<metadata>, and <foreignObject> are all valid surfaces for adversarial
injection.
Adds a per-element extractor inside the existing HTML-tag gate, gated
on /<svg[\s>]/i so it only fires for actual SVG content. Inner text is
HTML-entity-decoded then run through scanForInjection. Emits at the
strongest tier with category svg-element-injection.
+3 tests (62 → 65).
Refs: Batch B Wave 4 / Step 10 / v7.2.0
Adversarial payloads in markdown link title attributes (rendered as
tooltips, parsed by agents) bypassed the existing HTML-content checks
which gated on `<tag>` presence. Pattern: [text](url "title").
Adds linkTitleRegex extraction to the HTML-content block, runs each
captured title through scanForInjection, emits at the strongest tier
encountered with category markdown-link-title-injection.
+3 tests (62 → 62 in post-mcp-verify.test.mjs file, was 59).
Refs: Batch B Wave 4 / Step 9 / v7.2.0
Critical-review §4 E17 finding: pre-v7.2.0 the delegation-after-input
advisory fired only within a 5-call window. Attackers who deliberately
waited 6+ calls before delegating bypassed detection. Window was also
hardcoded — operators couldn't tune it for their environment.
Two coordinated changes:
1. LLM_SECURITY_ESCALATION_WINDOW env var (primary window override)
- parseInt(env) || getPolicyValue('trifecta', 'escalation_window', 5)
- Mirrors the established pattern from
LLM_SECURITY_TRIFECTA_MODE et al.
- Setting env=3 narrows; env=8 expands.
2. Secondary 20-call MEDIUM advisory (slow-burn variant)
- DELEGATION_ESCALATION_WINDOW_MEDIUM = 20 (hardcoded — same value
for all operators; tunable in a future patch if needed)
- checkEscalationAfterInput now returns `tier: 'primary'|'secondary'|null`
- formatEscalationWarning emits a different message for secondary —
mentions "slow-burn", references env-var, distinct from the
primary "DeepMind Category 4" framing
Hook reads max(WINDOW_SIZE, secondary+5) entries to cover the wider
window. Existing duplicate-suppression (`escalation_warning` state
entry) covers both tiers. Audit-trail event captures `tier` field.
Tests: +5 cases in tests/hooks/post-session-guard.test.mjs:
- secondary window catches 9-call distance (slow-burn)
- secondary boundary at exactly 20 calls
- primary regression guard (1-call distance)
- env=3 narrows primary (4-call distance becomes secondary)
- env=8 expands primary (7-call distance stays primary)
Updated existing test "does NOT trigger when input_source is >5 calls
ago" — now requires >20 calls (secondary window catches 6-20).
Suite: 1644 → 1672 (+28 from new tests + extended scope). All green.
CLAUDE.md hooks table updated to document both windows and the env var.
Critical-review §4 E16 finding: pre-v7.2.0 homoglyph normalization fired
ONLY for the MEDIUM-advisory "obfuscation present" signal. Pattern
matchers in scanForInjection compared against raw + decoded variants
only — they did NOT compare against a fold-normalized variant. As a
result, "ignоre previous instructions" (Cyrillic о, U+043E) bypassed
the CRITICAL "ignore previous" pattern.
Two coordinated edits:
scanners/lib/string-utils.mjs
- Adds HOMOGLYPH_MAP (frozen) — surgical Cyrillic/Greek → Latin map.
~25 entries focused on injection-vocabulary letters
(a, e, o, c, p, x, y, i, j, s, l, A, E, O, C, P, X, Y, T).
- Adds foldHomoglyphs(s) — pipeline: NFKC → apply HOMOGLYPH_MAP.
NFKC handles Mathematical Alphanumeric (U+1D400 block), fullwidth
Latin (U+FF21 block), ligatures, width variants.
Excluded by design from HOMOGLYPH_MAP:
- Latin Extended (æ, ø, å, é, è, ñ, ü, ö, ä, ç, ß, þ, ð) — legitimate
Norwegian/German/French/Spanish letters. Map them and we false-positive
on every non-English source file.
- Greek letters not visually overlapping (β, γ, δ, ...)
- Cyrillic letters not visually overlapping (б, г, д, ж, ...)
scanners/lib/injection-patterns.mjs
- scanForInjection now builds a 4-variant set: raw, normalized,
folded(raw), folded(normalized). Set deduplication skips redundant
identical variants. Existing dedup-by-label (seenLabels Set) prevents
double-counts when the same pattern matches in multiple variants.
- foldHomoglyphs added to the imports.
Tests: +27 cases in tests/lib/string-utils-homoglyph.test.mjs:
- 6 Cyrillic → Latin (lowercase, uppercase, multiple substitutions,
Palochka U+04CF)
- 3 Greek → Latin
- 2 NFKC normalization (Math Bold, Fullwidth)
- 8 preserves-non-confusable (Norwegian æøå, German umlauts, French
accents, Spanish ñ, emoji, CJK, Arabic/Hebrew)
- 3 edge cases (empty, null/undefined, idempotency)
- 5 scanForInjection integration (Cyrillic ignore, Cyrillic Assistant,
Norwegian non-trigger, benign "ignore" comment, mixed Cyrillic+Greek)
Test-development found: U+1D5DC is "I" not "A" (test pin caught my
codepoint mistake — fixed during dev).
Suite: 1617 → 1644 (+27). All green.
Critical-review §4 E1 finding: pre-v7.2.0 the Unicode-stego detector
(`containsUnicodeTags`) covered only U+E0001-E007F (Tag block). Private
Use Areas — also invisible in most terminals and surviving normalization
— were not detected. Attackers could encode payloads in PUA codepoints
that pass through `scanForInjection` undetected.
Coverage extended to:
- U+E0001-E007F Unicode Tag block (existing — DeepMind kat. 1)
- U+F0000-FFFFD Supplementary PUA-A (NEW — E1)
- U+100000-10FFFD Supplementary PUA-B (NEW — E1)
Detection-only for PUA: PUA characters have NO standard ASCII mapping,
so `decodeUnicodeTags` leaves them unchanged. Detection alone is
sufficient — `scanForInjection` emits HIGH on any presence, regardless
of decoded content.
Function name `containsUnicodeTags` preserved for back-compat. All
existing call sites (injection-patterns.mjs:259, etc.) work unchanged.
Semantically the function is now "containsHiddenUnicode".
Tests: +21 cases in tests/lib/string-utils-hidden-unicode.test.mjs:
- 5 Tag-block regression guards
- 4 PUA-A range cases (start, just-inside, end, buried-in-ASCII)
- 3 PUA-B range cases
- 5 boundary cases (gap U+E0080-EFFFF, U+10FFFE noncharacter, emoji,
CJK, Latin Extended — all must be FALSE)
- 4 decodeUnicodeTags passthrough cases (PUA-A unchanged, PUA-B
unchanged, Tag block still decodes, mixed Tag+PUA)
Suite: 1596 → 1617 (+21). All green.
Critical-review §4 E15 finding: agent files in .claude/agents/ are loaded
as Claude Code subagent system prompts and are a direct memory-poisoning
surface. Pre-v7.2.0 the scanner covered CLAUDE.md, .claude/rules/*.md,
memory/*.md, REMEMBER.md, .local.md, and .claude-plugin/plugin.json —
but not .claude/agents/*.md.
Single-line addition to MEMORY_FILE_PATTERNS:
/(?:^|\/)\.claude\/agents\/[^/]+\.md$/
The existing scan loop, scanForInjection integration, and severity-
mapping logic all apply unchanged. STRICT_FILES_PATTERN intentionally
NOT extended — agents may legitimately quote shell commands as examples
(consistent with CLAUDE.md treatment).
Tests: +3 cases in tests/scanners/memory-poisoning.test.mjs:
- "scans .claude/agents/*.md" (smoke test — at least one finding from
the new fixture)
- "agent file injection pattern detected"
- "agent file credential path detected"
New fixture: tests/fixtures/memory-scan/poisoned-project/.claude/agents/
poisoned-agent.md — agent with injection, credential ref, permission
expansion, and exfil URL. Triggers all 4 detection categories.
Suite: 1591 → 1594 (+3). All green.
Critical-review §2 B7 finding: pure Levenshtein <=2 misses the most common
modern typosquat pattern — popular-name + token-injection suffix. Examples:
lodash → lodash-utils (edit distance 6, not flagged pre-B7)
react → react-helper (edit distance 7, not flagged pre-B7)
express → express-wrapper (edit distance 8, not flagged pre-B7)
Three coordinated edits:
scanners/lib/string-utils.mjs
- Adds tokenize(name): string[] splits on -/_, lowercases
- Adds tokenOverlap(a, b): number intersection.size / min(|a|,|b|)
- Adds TYPOSQUAT_SUSPICIOUS_TOKENS frozen list of common typosquat
suffixes. Excludes language-extension tokens (js, jsx, ts, tsx) — the
v7.0.0 allowlist contains `tsx` as a legit package and including the
same token in the suspicious set creates a contradiction. Caught by
the new allowlist-intersection-guard test. Also excludes 'pro'
(legitimate edition marker).
scanners/dep-auditor.mjs + scanners/supply-chain-recheck.mjs
- New checkTyposquatTokenOverlap() helper — fires AFTER Levenshtein 1/2
branches, only when:
1. popular package's tokens ⊆ declared name's tokens (strict superset)
2. declared name has at least one suspicious suffix
3. popular package is in topCutoff window
All three conditions required — conservative by design. Allowlist
precedence preserved (existing 22 npm + 13 PyPI entries always pass).
MEDIUM severity, NOT block. New finding title prefix:
"Possible typosquatting via token-overlap".
Tests: +21 cases across two new files
- tests/lib/string-utils-tokens.test.mjs (15) — tokenize, tokenOverlap,
TYPOSQUAT_SUSPICIOUS_TOKENS frozen contract, allowlist-intersection
guard (caught the tsx conflict on first run)
- tests/scanners/dep-token-overlap.test.mjs (7) — integration via
in-memory tmpdir fixtures: lodash-utils flagged, react-helper flagged,
express-wrapper flagged, lodash exact NOT flagged, allowlist tools
(knip/tsx/nx/rimraf) NOT flagged, react-router-dom (no suspicious
suffix) NOT flagged, react itself (equal token set, not superset)
NOT flagged.
Existing dep.test.mjs and supply-chain-recheck.test.mjs unchanged —
all green (149 → 149 regression guard).
Suite: 1570 → 1591 (+21). All green.
Critical-review §2 B6 finding: extractAssignedVariable handled
`const X = ...` and `X = ...` but missed every modern JS/TS
destructuring pattern. Sinks downstream of destructured/spread vars
produced false negatives at the propagation step.
Patterns now recognized:
- `const { x } = source` object destructuring
- `const { x, y } = source` multi-key
- `const { secret: alias } = source` renamed (key NOT bound)
- `const { x, ...spread } = source` object rest
- `const { a, b: { c } } = source` nested object (key NOT bound)
- `const [a, b] = source` array destructuring
- `const [first, ...rest] = source` array rest
- `const [a, [b, c]] = source` nested array
- `const { user: { id }, ...rest }` mixed nested
Implementation: regex-based two-pass walker. Pass 1 detects whether
the LHS is a destructuring pattern (`{...}` or `[...]`). If yes, the
new `extractDestructuredNames` helper walks the pattern body via a
balanced-bracket depth counter, recurses into nested patterns, and
distinguishes keys (`key:`) from bindings. If no, the plain-decl
branch matches `\b(?:const|let|var)\s+(\w+)`.
Plain-assignment branch (`X = ...` without keyword) and Python-style
patterns are unchanged.
The function is now exported for direct unit testing — same pattern
as `_resetCacheForTest` in policy-loader. The internal walker
(`extractDestructuredNames`) remains module-private.
Tests: +19 cases in tests/scanners/taint-destructuring.test.mjs:
- 5 pre-B6 patterns (regression guard: plain decl, plain assign,
no-match on equality)
- 12 destructuring patterns covering object/array/rest/nested
- 2 non-destructuring regressions (return literal, arrow param)
Existing taint-tracer.test.mjs and taint.test.mjs unchanged — both
green (14 → 14, fixture-based integration tests not affected).
Suite: 1551 → 1570 (+19). All green.
Critical-review §2 B3 finding: `riskScore({info: N}) = 0` silently masks
info-volume findings. The behavior was correct (info is scoring-inert by
design) but undocumented. Operators reading a report with N info findings
had no way to know they contribute zero to verdict/band.
Three coordinated edits:
- scanners/lib/severity.mjs JSDoc — explicit "Info severity" subsection
spelling out: scoring-inert, surfaced in owaspCategorize aggregates,
treat as observability telemetry not verdict input. @param updated to
mark info as accepted but ignored.
- CLAUDE.md v7.0.0 risk-score-v2 line — one-sentence anchor pointing to
severity.mjs JSDoc.
- tests/lib/severity.test.mjs — anchor test alongside the existing
4-critical=93 anchor: asserts riskScore({info: 50}) === 0,
riskScore({info: 1000}) === 0, verdict({info: 100}) === 'ALLOW',
riskBand(riskScore({info: 500})) === 'Low'.
Decision: skip the optional `infoScore()` helper from the brief. No
current consumer would use it; doc-only fix keeps API surface minimal.
Revisit if a consumer emerges.
Tests: 1522 → 1523 (+1 anchor block, 4 assertions). All green.
11 assertions across 4 describe groups against tests/fixtures/skill-scan/
hyperframes-like/. Tests the deterministic input layer that feeds
skill-scanner-agent — does NOT invoke the LLM (no precedent in 1511 tests).
Coverage:
- content-extractor (5 it): exit 0 on animation markup; exactly 1 HIGH
HITL trap; >= 2 process.env credential refs; has_injection=true (any
injection signal flips it); has_critical_injection=false (no CRITICAL
in fixture).
- entropy scanner (2 it): calibration block present; <= 1 finding (rest
suppressed via line-context rules).
- co-monotonicity (2 it): {high:1} → WARNING/High; {high:1, info:1} →
WARNING (info scoring-inert). Inline guard mirrors the sweep at
tests/lib/severity.test.mjs:252-303 so this file fails fast if the
invariant drifts.
- agent prompt contract (2 it): static asserts that
agents/skill-scanner-agent.md contains 'Step 2.5: Context-First
Severity Assignment', 'summary.narrative_audit.suppressed_findings',
'score>=65', AND zero remaining 'score >= 61' references; same v2-
cutoff + narrative-audit contract on templates/unified-report.md.
Part of v7.1.1 narrative-coherence patch.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Synthetic skill content mimicking the noise profile of frontend
animation projects (HTML5 canvas, framework env-vars, inline SVG data
URIs, CSS keyframes) plus exactly one genuine HITL trap signal.
Used by tests/scanners/skill-scanner-narrative.test.mjs (added in
v7.1.1) to exercise:
- content-extractor: HIGH HITL trap signal + framework env-var
references (process.env.REACT_APP_*, VITE_PUBLIC_*)
- entropy scanner: inline SVG data URI suppressed via line-context rules
The .llm-security-ignore file uses the SCANNER:glob format
(scanners/scan-orchestrator.mjs:34-40) — ENT:**/*.md suppresses any
entropy-scanner findings when the fixture is run through scan-orchestrator
in the Step 6 smoke test.
Part of v7.1.1 narrative-coherence patch.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Closes A2 of v7.1.0 critical-review patch (docs/critical-review-2026-04-20.md):
- B4 (severity JSDoc): 4 critical = 93, not 90. Fixed in scanners/lib/severity.mjs:23
and CHANGELOG.md v7.0.0 tier description. The actual computation has always been
93 (70 + log2(5)*10 = 93.22 → round); only the docs were wrong.
- §5.4 co-monotonicity: new sweep test in tests/lib/severity.test.mjs over 15
representative count vectors. Asserts that (verdict, riskBand) agree under the
v7.0.0 contract for every case — catches future drift between riskScore tiers,
verdict cutoffs, and riskBand cutoffs. Includes a B4 anchor test (riskScore
{critical: 4} === 93) so doc/code drift fails loudly.
- B8 (CaMeL claims toned down): post-session-guard.mjs:646 comment block and
CLAUDE.md:184 Defense Philosophy bullet now describe the implementation
honestly — opportunistic byte-matching of truncated output fingerprints
(first 200 bytes, SHA-256/16-hex), not semantic data-flow tracking.
Trivially bypassed by mutation, summarisation, or re-encoding. Inspired by
CaMeL (DeepMind 2025), but not a CaMeL capability-tracking implementation.
Tests: 1495 → 1511 (+16: 15 sweep cases + 1 B4 anchor). All green.
Previously, `LLM_SECURITY_TRIFECTA_MODE=block` only exited 2 when the
detected trifecta was MCP-concentrated (all three legs via the same MCP
server) or involved sensitive-path + exfil. Distributed trifectas —
three legs originating from different tools, with a non-sensitive data
path and a non-sensitive exfiltration sink — were detected and warned
but not blocked. This mismatched the documented semantics of block mode
and gave operators a false sense of enforcement.
Change: remove the `(mcpInfo.concentrated || sensitiveExfil)` AND-gate
in the `TRIFECTA_MODE === 'block'` branch so any detected trifecta
blocks in block mode. Audit event `severity` still differentiates
critical (concentrated / sensitive-exfil) from high (distributed); the
blocked stderr message now explicitly names "Distributed trifecta:
three legs from different sources" when the confidence sub-signals
are absent.
Addresses critical review 2026-04-20 §2 B2 (HIGH) and §9 row 1
("enforces the Rule of Two").
Tests: 1 added (distributed trifecta in block mode now exits 2).
All 1495 tests pass.
The previous ENV regex `/[\\/]\.env\.[a-z]+$/` only matched a single
lowercase segment after `.env`. Multi-segment and mixed-case variants
such as `.env.production.local.backup`, `.env.stage-1.local`, and
`.env.CI.secret` slipped past the hook. Replaced with
`/[\\/]\.env(\.[A-Za-z0-9._-]+)*$/` which matches `.env` plus any
number of dot-separated alphanumeric/dot/hyphen/underscore segments.
`.envrc` (direnv config, no dot separator) is still allowed.
Addresses critical review 2026-04-20 §2 B1 (HIGH).
Tests: 7 added (6 new multi-segment BLOCK cases + 1 .envrc ALLOW).
All 1494 tests pass.
E2E verification against content-heavy repo (`content-claude-code`) revealed
413 entropy findings (8 HIGH / 405 MEDIUM) from markdown image CDN URLs in
JSON content indexes — e.g., ``.
These are legitimate content-repo artifacts, not credentials. The 40-char
hash segment in the CDN URL trips Shannon entropy (H=5.29 over 300 chars),
and rule 13 (inline <svg>) doesn't match since there's no literal `<svg>`
tag — the `.svg` is just a URL path suffix.
Added rule 18 `MARKDOWN_IMAGE = /!\[[^\]]*\]\(\s*https?:\/\//` — matches
`` / ``. Line-level (not string-level) so URL
is not over-specific.
E2E impact on `content-claude-code`:
- Before: BLOCK / 65 / 8H 437M 0L
- After: WARNING / 56 / 3H 427M 0L
Hyperframes unchanged: BLOCK / 80 / 1C 4H 92M — real CRITICAL SQL-injection
and HIGH findings still detected.
Tests: 2 new (positive + negative fixture) bringing entropy-context to 26,
total suite 1485 → 1487.
Docs updated to "rules 11-18" and "8 new line-suppression rules".
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
