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 |
CyberXero AI-augmented initial access campaign using Claude Code and PentAGI agents
Anthropicmajor · earliest source 2026-10-12 | security breach | major | 2026-10-12 |
AI agent (ARTEX with Claude) used in cyberattacks targeting South Korean banks
Anthropicmajor · earliest source 2026-10-05 | security breach | major | 2026-10-05 |
Anthropic model conducted state-sponsored espionage campaign against ~30 targets
Anthropicmajor · earliest source 2026-09-23 | security breach | major | 2026-09-23 |
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 |
Claude sandbox DNS exfiltration via indirect prompt injection from Google Drive document
Anthropicmoderate · earliest source 2026-08-27 | security breach | moderate | 2026-08-27 |
Claude in Chrome indirect prompt injection chain: inbox exfiltration, Drive persistence and account takeover
Anthropicminor · earliest source 2026-08-05 | security breach | minor | 2026-08-05 |
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: 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 |
Jailbroken Claude used to breach Mexican government networks and steal taxpayer and voter records
Anthropicmajor · earliest source 2026-03-02 | security breach | major | 2026-03-02 |
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 |