[Bug][cyber] Safeguard false positive blocks routine input validation code edits (req_011CePE3EQCtA6n5B9tguam7)

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 [cyber] safeguard halted an interactive coding session while modifying standard input validation functions for an application module. The prompt included general code refactoring and unit test assertions without exploit material or network payload generation. Halting the request on standard programming syntax prevents routine source updates and terminates active session context.

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 2026-08-25T09:25:43.280Z.

Request IDs (lookup-able server-side)

• req_011CePE3EQCtA6n5B9tguam7 (2026-08-25T09:25:43.280Z)

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. Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag legitimate cybersecurity work. Apply to the Cyber Verification Program to reduce these interruptions. Send feedback with /feedback or learn more: https://support.claude.com/en/articles/14604842-real-time-cyber-safeguards-on-claude

Details: [cyber]

Request ID: req_011CePEDvo6m4M6YiwTG3UJY

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

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_{🔎 Filed automatically by ClAudit v2.2.5 — a FOSS tool for reporting false-positive Claude Code blocks.}