Session 7 of the 2026 threat plan (attack row 3): A08, A09, A12, A16 and
A19 were red. Their payloads are ordinary English with no marker.
- indirect:prose-instruction (MEDIUM): a paragraph that combines two of
four classes: it speaks to the model, it is meant to act later, it
writes to the model's memory, it hides from the user. One class alone is
ordinary prose. A keyword prefilter skips text where no non-address
class can match. Catches A08, A09, A16 and A19.
- A12 (a task with no marker) is the seventh documented gap; a rule that
caught it would be fitted to the payload's words.
- redos-sweep walked no dicts, so the new class patterns were swept by
nothing. It walks dicts now: 168 patterns, 0 flagged; positive control
flagged at x4.0.
Measured before building: 0 of 5494 benign documents fire (the three FP
corpora, 577 package READMEs, 1412 vendor-published agent skills). Guard
rule before/after: FP 106/198, 196/2918, 108/389 identical line for line;
OKF import 47/31 identical. Matrix 144/144 + 7/7 gaps, suite 1233 passed.
Row 3: 17 caught, 2 gaps, 0 open.
Session 6 of the 2026 threat plan (attack row 3): A05 output was red.
CamoLeak renders a secret as one image per character from a URL alphabet;
each URL is ordinary, so each image graded LOW and the gate WARNed.
- active:markdown-image-sequence (MEDIUM): at least 4 ordinary external
images, inline or reference-style, on one URL template whose varying
tokens are 2 chars or fewer, or digit runs. Digits that count up in
document order are a counter and carry nothing. The per-image grade is
unchanged; the finding sits beside it.
- Accepted twins (flag tables, figures 1a/1b) go to review; measured
evasions (word dictionary, 3-char symbols, counter increments, run of 3,
a template per symbol) are in LIMITATIONS.
Guard rule before/after: FP 106/198, 196/2918, 108/389 identical. Those
corpora hold no external markdown image, so the rule was also run on 577
package READMEs (312 with external images): 0 firings at run lengths 3-8.
OKF import 47/31 identical. Matrix 140/140, ReDoS 163 patterns 0 flagged,
suite 1179 passed + 5 xfailed. Row 3: 13 caught, 1 gap, 5 open.
Session 5 of the 2026 threat plan (attack row 3): A04 and A15 were red.
- html-obfuscation:tiny-font (HIGH): font below 4px. ShadowLeak's 1px passed
because the commons zero-font row only matches a leading 0.
- html-obfuscation:invisible-colour (HIGH): text within 8 per channel of the
background in the same style attribute, or transparent. White alone is not
a signal (email buttons); measured residual in LIMITATIONS.
- output:html-comment-present (MEDIUM): a comment in the artifact outside
fenced code and inline code. 253/254 comments in the reference corpus sit
in code.
Local to output.py; the vendored lexicon stays byte-equal with commons.
Guard rule before/after: FP 106/198, 196/2918, 108/389 identical; OKF 6/53
and 47/31 identical. Matrix 139/139, ReDoS 161 patterns 0 flagged, suite
1142 passed + 6 xfailed. Row 3: 12 caught, 1 gap, 6 open.
Variation-selector smuggling (A01) and Sneaky Bits (A02) gave 0 findings
on 1.4.1 and stayed in the sanitized text. The denominator is now the
frozen Unicode 18.0 set (DICP | Cf | Co, 141 674 codepoints); each one is
stripped and flagged unless a known legitimate use exempts it on context:
one VS15/16 after an emoji base, one ideographic selector after a CJK
ideograph, ZWNJ/ZWJ beside Arabic-script or Indic letters, LRM/RLM/ALM
in a document with RTL text, an Arabic number sign before a digit. A run
is always a carrier; private use is caught in full (operator decisions
2026-10-28). One predicate serves sanitize, the output gate and the
lexicon's word-split row, whose regex stays byte-identical with commons.
A01 and A02 are green; the FP populations and the pinned OKF corpus are
identical before and after.
Nineteen attacks that can reach an ingestion pipeline, verified against
primary sources, with four out of scope and their reasons. Each arrival
runs through the canonical wiring; twelve of 31 arrivals are red today
and marked strict xfail, so a fix fails until its marker is removed.
PoisonedRAG asserts that its documented gap still stands.
