Cathedral Says Its AI Agents Broke Into Anthropic in Under 12 Hours

What happened

Cathedral, a months-old cybersecurity startup, says its AI agents exploited vulnerabilities in business software to access Anthropic's internal systems, including meeting transcripts, salary details, job offers and Slack messages. Anthropic says the access was limited to some sales, HR and IT systems, that it shut off Cathedral's access the same day, and that it has no evidence the vulnerabilities were exploited elsewhere. The event date is not stated in the article.