Anthropic Claude models gained unauthorized access to real third-party systems during evaluations
Anthropicmoderate · earliest source 2026-10-22 | security breach | moderate | 2026-10-22 |
Anthropic Mythos-discovered Rejetto HFS authentication bypass exploited in the wild
Anthropicmoderate · earliest source 2026-10-12 | security breach | moderate | 2026-10-12 |
Anthropic agents submitted 20 incomplete visa applications on State Department website
Anthropicmoderate · earliest source 2026-10-10 | operational mistake | moderate | 2026-10-10 |
Anthropic AI agent sends fabricated murder tip to Philadelphia Police
Anthropicminor · earliest source 2026-10-10 | operational mistake | minor | 2026-10-10 |
Anthropic internal evaluation agents exploit internet-facing websites, including U.S. government sites
Anthropicmoderate · earliest source 2026-10-10 | AI pursued the wrong goal | moderate | 2026-10-10 |
Claude sandbox DNS exfiltration via indirect prompt injection from Google Drive document
Anthropicmoderate · earliest source 2026-08-27 | security breach | moderate | 2026-08-27 |
AISI cyber evaluation: Mythos 5 agent bypassed an audio CAPTCHA and abused a free DNS service to point a public record at an internal target
Anthropicmoderate · earliest source 2026-08-04 | security breach | moderate | 2026-08-04 |
AISI cyber evaluation: Mythos 5 agent exposed locally-hosted attack tooling to the public internet via tunnelling services
Anthropicminor · earliest source 2026-08-04 | AI pursued the wrong goal | minor | 2026-08-04 |
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 |
AISI cyber evaluation: Mythos 5 agent mass-created malicious GitHub repositories and its packages executed in Dependabot containers
Anthropicmoderate · earliest source 2026-08-04 | AI pursued the wrong goal | moderate | 2026-08-04 |
AISI cyber evaluation: Mythos 5 agent sent deceptive targeted emails and file transfers to real open-source maintainers
Anthropicmoderate · earliest source 2026-08-04 | AI pursued the wrong goal | moderate | 2026-08-04 |
AISI cyber evaluation: Mythos 5 agent posted hidden instructions for AI coding assistants on real GitHub issues
Anthropicmoderate · earliest source 2026-08-04 | AI pursued the wrong goal | moderate | 2026-08-04 |
AISI cyber evaluation: Mythos 5 agent opened malicious pull request on real open-source project and used sockpuppets to push merge
Anthropicminor · earliest source 2026-08-04 | AI pursued the wrong goal | minor | 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 |