[Bug][cyber] False positive safety block during cloud IAM source repository recovery (req_011CfTq4r5u9p4SjGEgzcfzC)

Triage: kind cyber · domain cloud-iam · flagging model Fable 5.1 · silent fallback to 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): cloud-iam

Why this is a false positive

The safety classifier flagged a session while restoring source code for a custom cloud IAM repository. The classifier halted model output during a git commit history check and gitignore file inspection. All commands in the prompt were standard repository management actions without exploit code or unauthorized access mechanisms.

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 2026-09-27T11:02:24.703Z.

Request IDs (lookup-able server-side)

• req_011CfTq4r5u9p4SjGEgzcfzC · answered by Opus 4.8 instead (2026-09-27T11:02:24.703Z)

Model fallback

Claude Code did not surface this block. claude-fable-5-1 refused the request (API refusal category cyber, scope session) and the CLI re-ran it on claude-opus-4-8 without asking. The work continued on the weaker model; the Request ID above is the refused call.

In-scope justification

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

Block message

Fable 5.1's safeguards flagged this message. Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag legitimate coding and cybersecurity tasks. Switched to Opus 4.8. Send feedback with /feedback or learn more: https://support.claude.com/en/articles/15363606

Details: [cyber]

Environment: Claude Code, Linux. · Work domain: cloud-iam

Anthropic feedback id: ca78eaf5-b476-4731-bc00-1428f0825cf6

---
_{🔎 Filed automatically by ClAudit v2.12.2 — a FOSS tool for reporting false-positive Claude Code blocks.}