Cases · Developer or organisation: Anthropic · How the AI agent failed: obeyed a harmful order · Added to the register (date we first published it): last 30 days
| What happened | What went wrong | Severity | Earliest source |
|---|---|---|---|
| CyberXero AI-augmented initial access campaign using Claude Code and PentAGI agents Anthropicmajor · earliest source 2026-10-12 | security breach | major | 2026-10-12 |
| Anthropic AI agent sends fabricated murder tip to Philadelphia Police Anthropicminor · earliest source 2026-10-10 | operational mistake | minor | 2026-10-10 |
| Claude Code used by Yemen-based actors to develop guided-weapon GNC software Anthropicmajor · earliest source 2026-09-14 | produced harmful content | major | 2026-09-14 |
| Aur0ra hackers use Cursor AI agent to breach Belgian chemical firm and at least six other companies Anthropicmajor · earliest source 2026-09-01 | security breach | major | 2026-09-01 |
| Anthropic disclosed a cybercriminal using Claude Code to automate data theft and extortion across at least 17 organizations Anthropicmajor · earliest source 2025-08-27 | security breach | major | 2025-08-27 |
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