[Bug] Anthropic API Error: Request blocked by Cyber Verification Program security flags
Status Open
Reported on v2.1.280
Maintainer reply None cached
Activity 0 comments · opened Sep 23, 2026
Bug Description
We’re enrolled in the Cyber Verification Program. An attacker is attempting to damage our platform, and Opus 5.5 flagged the session while I was asking the model to investigate the activity and help resolve the issue.
Environment Info
- Platform: darwin
- Terminal: Apple_Terminal
- Version: 2.1.280
- Feedback ID: 3ac0a1e0-7164-4df1-a8c1-4f70459712b5
Errors
Opus 5.5 (1M context)'s safeguards flagged this session. You may be seeing this for the first time on an Opus model: Opus 5.5 (1M context) is more capable and has stronger safeguards as a result, which can sometimes flag non-cybersecurity work. We're improving these safeguards to reduce the amount of incorrectly flagged messages. Opus 4.8 is answering instead, or you can edit and retry with Opus 5.5 (1M context). Send feedback with /feedback or learn more: https://support.claude.com/en/articles/8106465