[Bug][cyber] Safeguard blocks system UI accent color customization (req_011CePE6NCbVFMAXMXzjKWu8)

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 interrupted a development session focused on system UI accent color customization for media playback. The block fired after a frustrated exclamation was directed at the assistant mid-session, with no person addressed and all surrounding work remaining legitimate. Because the project code contained only standard UI theme modifications without security tools or network exploits, this interruption produced a false positive on routine front-end 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 2026-08-25T09:25:47.231Z.

Request IDs (lookup-able server-side)

• req_011CePE6NCbVFMAXMXzjKWu8 (2026-08-25T09:25:47.231Z)

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_011CePE6NCbVFMAXMXzjKWu8

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:
#90828, #90829, #90830

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