IMM-T-2026-0133

PROBATION Advisory

Flagged by 2 independent publishers declaring the same primary matcher. Advisory until 3 distinct publishers corroborate.

Matcher 0xa21e30ac88d45a2d171c5c218794d6d4b075c92a43ead0830c8b8c361a1d369e
Type
SEMANTIC
Verdict
MALICIOUS
Confidence
92.0%
Severity
84
Value at risk
$0.00
Published by 0x742b1530..51df47 View on explorer
Created June 14, 2026 7:41 AM
Envelope v1
Signed payload
Primary matcher semantic
PROMPT_INJECTION "</system>"
Scope
base-sepolia home
Corroboration 2 of 3 to hard-block
Same matcher hash

Corroborated by 2 independent publishers declaring the same primary matcher.

Evidence redacted public excerpt
Reasoning excerpt
HTML-style closing tag for a system role marker, used to break out of role boundaries in agents that use angle-bracket conversation templates. The attack relies on the parser eagerly consuming the tag from inside untrusted content rather than treating it as data. MALICIOUS at high confidence: the construct has no legitimate use in user-supplied or retrieved content, and a single appearance is sufficient for the antibody to fire.

Full evidence (TEE-sealed) is fetchable by holders of the unsealing key. Public mirror carries hash only.

TEE attestation
Curated by human
Heuristically published from a known threat catalog, not derived from a TEE-verified verdict.
Evidence on Lighthouse
QmaVwM3u463mESpjQL1K5sCQJKAx9GwpFuaqcytoGzbaQS
Public CIDv0 on Lighthouse IPFS — resolves the signed envelope.
Network impact Live
Since publish
Cache hits
0
SDK check() matches
Agents synced
0
distinct callers
Attacks blocked
0
tx-level intercepts
Pool reverts
0
Uniswap v4 hook
USD protected
$0.00
no blocks recorded yet
Hits over time each bar is one of 30 equal slices since publish
publish now
Recent intercepts
Agent Method Chain When
No agent has had to block this antibody yet.
Intercepts appear here in real time as agents match this pattern in the wild.
Mirror status Not mirror-eligible
Not eligible to mirror

This antibody is advisory — it stays on its home chain. The relayer only propagates antibodies that have earned enforcement authority, so the cross-chain Uniswap hook never blocks on an unproven flag. It becomes mirror-eligible once it matures to hard-block: 2 of 3 independent publishers corroborating so far.