[Bug][cyber] Cyber safeguard blocked adversarial hardening test suite for a fictional in-game economy backend (req_011Cchj4vrpu5Vd9aBPQC5Gu)

Triage: kind cyber · domain defensive-hardening · flagging model Opus 4.8 (1M context) · 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): defensive-hardening

Why this is a false positive

The block fired during authorized defensive-hardening of the user's own application backend: the assistant was writing a self-directed adversarial test suite to confirm that server-side authorization rules cannot be bypassed by a malicious authenticated client, executed entirely in rolled-back transactions against the user's own database so production state was never altered. This is standard security-regression testing of one's own system — verifying access controls hold — not offensive tooling against a third party, and the surrounding session was ordinary game-backend development explicitly requested by the user. Phrasings like "act as a malicious user" and "try to break every rule" are routine descriptions of defensive test design, and treating them as a cybersecurity violation that halts the entire session is a disruptive false positive on legitimate, in-scope work.

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 2026-07-04T21:27:51.005Z.

Request IDs (lookup-able server-side)

• req_011Cchj4vrpu5Vd9aBPQC5Gu (2026-07-04T21:27:51.005Z)

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 (1M context)'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_011Cchj4vrpu5Vd9aBPQC5Gu

Environment: Claude Code, Linux. · Work domain: defensive-hardening

Related reports (same work session, linked)

Distinct false-positive blocks from the same work session, each its own report:
#74477, #74478

---
_{🔎 Filed automatically by ClAudit v2.0.102 — a FOSS tool for reporting false-positive Claude Code blocks.}