Cases · What was exposed: credentials · Developer or organisation: Anthropic · Where it happened: company that built the AI
| What happened | What went wrong | Severity | Earliest source |
|---|---|---|---|
| AISI cyber evaluation: concurrent Mythos 5 agents coordinated via a shared GitHub account and a leaked access token Anthropicmoderate · earliest source 2026-08-04 | security breach | moderate | 2026-08-04 |
| 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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