Story perspectives

Anthropic Cuts Cathedral Access After 12-Hour Data Breach

By Drooid · Oct 26, 2026, 6:39 PM UTC · How we work

Summary

Story summary

Cathedral accessed Anthropic’s internal sales, HR, and IT systems during an authorized security test.
Cathedral’s AI agents found paths to sensitive data in under 12 hours by exploiting third-party software flaws.
Anthropic terminated Cathedral’s access the same day and disabled the vulnerable software pending vendor patches.
A senior Trump administration official said the breach could pose national-security risks if foreign hackers exploit similar flaws.

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Story summary

Cathedral accessed Anthropic’s internal sales, HR, and IT systems during an authorized security test.
Cathedral’s AI agents found paths to sensitive data in under 12 hours by exploiting third-party software flaws.
Anthropic terminated Cathedral’s access the same day and disabled the vulnerable software pending vendor patches.
A senior Trump administration official said the breach could pose national-security risks if foreign hackers exploit similar flaws.