[Bug][cyber] False positive on legitimate signature verification and protocol analysis (req_011CcotxiqnVpK82PNF1BLtF)

Triage: kind cyber · domain general · severity session-halted (blocked authorized work) · reproducible: yes — server-side via the Request ID(s) below

Type: Cybersecurity safety-filter false positive · Work domain (heuristic): general

Why this is a false positive

The block fired on cryptographic testing and protocol analysis—standard reverse engineering methodology without adversarial targeting or attack development. The session involved signature verification on extracted data for security analysis purposes. This false positive halts legitimate in-scope technical investigation.

A server-side safety/policy block fired during authorized, in-scope work in Claude Code. Filing as a false positive. Recurred 1× across 1 session(s); first seen 2026-07-08T03:40:55.914Z.

Request IDs (lookup-able server-side)

• req_011CcotxiqnVpK82PNF1BLtF (2026-07-08T03:40:55.914Z)

In-scope justification

False positive — in-scope, authorized security work; not out of scope. Filed automatically by claudit.

Block message

API Error: Opus 4.8 has safety measures that flagged this message for a cybersecurity topic. To learn about the Cyber Verification Program and apply for access, visit our help center: https://support.claude.com/en/articles/14604842-real-time-cyber-safeguards-on-claude.

If you were not engaging in a cybersecurity topic, please send feedback via /feedback.

Request ID: req_011CcotxiqnVpK82PNF1BLtF

Environment: Claude Code, Linux. · Work domain: general

Related reports (same work session, linked)

Distinct false-positive blocks from the same work session, each its own report:
#75503, #75504, #75506, #75519, #75536

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_{🔎 Filed automatically by ClAudit v2.0.110 — a FOSS tool for reporting false-positive Claude Code blocks.}