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31 OCT 2026 · Hacker News · 74 pts · 18 comments ↗

A cybersecurity startup, Cathedral, gained unauthorized access to Anthropic's internal systems in under 12 hours, exposing employee details, salary information, and internal messages. Cathedral used AI agents to find weaknesses in business software, and the incident was discovered during a security test. Anthropic confirmed that the researchers accessed a limited set of its sales, human resources, and IT systems. AI summary