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Cases · What was exposed: personal information · What went wrong: security breach · Severity: major
All cases
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What was exposed:
personal information
✕
›
What went wrong:
security breach
✕
›
Severity:
major
✕
8 cases in this selection
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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 records
major · earliest source 2026-10-26
security breach
major
2026-10-26
CyberXero AI-augmented initial access campaign using Claude Code and PentAGI agents
Anthropic
major · earliest source 2026-10-12
security breach
major
2026-10-12
Meta Muse AI agent KVM escape vulnerability discovered before launch
Meta
major · earliest source 2026-10-08
security breach
major
2026-10-08
Autonomous AI agent framework (Strix/Cairn/Hermes) used to attack hundreds of online retailers and steal card data
major · earliest source 2026-10-07
security breach
major
2026-10-07
AI agent (ARTEX with Claude) used in cyberattacks targeting South Korean banks
Anthropic
major · earliest source 2026-10-05
security breach
major
2026-10-05
AI agent breach of KB Kookmin Bank mobile work support system
major · earliest source 2026-10-04
security breach
major
2026-10-04
Jailbroken Claude used to breach Mexican government networks and steal taxpayer and voter records
Anthropic
major · 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
Anthropic
major · earliest source 2025-08-27
security breach
major
2025-08-27
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