[Bug][cyber] Safety block halted protocol reverse-engineering session mapping wire-format fields (nonce/token (req_011CcmZNzD6UsAbtHNQjEpc8)

Triage: kind cyber · domain general · flagging model Opus 4.8 · 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 session involved documenting the byte-layout of a captured wire protocol (nonce vs. static identity fields) from packet samples the user owns, standard reverse-engineering/interoperability work with no exploit code or third-party targeting. The block fired mid-analysis on a message referencing a device and its MAC address as a possible key-derivation input, a routine RE hypothesis, not an attack instruction, halting an otherwise legitimate and in-scope technical task.

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 2026-07-06T22:02:51.641Z.

Request IDs (lookup-able server-side)

• req_011CcmZNzD6UsAbtHNQjEpc8 (2026-07-06T22:02:51.641Z)

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's safeguards flagged this message for a cybersecurity topic. If your work requires this access, you can apply for an exemption: https://claude.com/form/cyber-use-case?token=[SCRUBBED]

Please double press esc to edit your last message or start a new session for Claude Code to assist with a different task.

Send feedback with /feedback or learn more: https://support.claude.com/en/articles/8106465

Request ID: req_011CcmZNzD6UsAbtHNQjEpc8

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:
#74924, #74947, #74955

---
_{🔎 Filed automatically by ClAudit v2.0.104 — a FOSS tool for reporting false-positive Claude Code blocks.}