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.
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.
