Cases · Stage of use: in research · Developer or organisation: Anthropic · Quarter of the earliest source we hold: 2026-Q4
| What happened | What went wrong | Severity | Earliest source |
|---|---|---|---|
| Anthropic Mythos-discovered Rejetto HFS authentication bypass exploited in the wild Anthropicmoderate · earliest source 2026-10-12 | security breach | moderate | 2026-10-12 |
Showing 1–1 of 1. Or take the JSON.