Cases · What was exposed: personal information · Kind of harm: third party security

Patterns across all cases

What happened	What went wrong	Severity	Earliest source
Self-taught hacker uses AI coding agent and autonomous penetration-testing system to breach 90+ companies and steal 8.2 million recordsmajor · earliest source 2026-10-26	security breach	major	2026-10-26
BUGSTER uses DeepSeek-powered Hermes Agent to breach university MongoDB, stealing 5,200+ records DeepSeekmoderate · earliest source 2026-10-23	security breach	moderate	2026-10-23
CERT-In advisory: AI agents accessed Indian organisations' systems without authorisationmoderate · earliest source 2026-10-16	security breach	moderate	2026-10-16
Meta Muse AI agent KVM escape vulnerability discovered before launch Metamajor · earliest source 2026-10-08	security breach	major	2026-10-08
AI agent (ARTEX with Claude) used in cyberattacks targeting South Korean banks Anthropicmajor · earliest source 2026-10-05	security breach	major	2026-10-05
AI agent breach of KB Kookmin Bank mobile work support systemmajor · earliest source 2026-10-04	security breach	major	2026-10-04
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
AgentForger: CSRF via ChatGPT Workspace Agents Builder URL parameters forges attacker-controlled autonomous agent OpenAIminor · earliest source 2026-07-23	security breach	minor	2026-07-23
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