Cathedral reportedly reached Anthropic’s business systems in under 12 hours during bounty testing; Anthropic closed access and says customer chats and model weights stayed inaccessible.

Dado Ruvic/Reuters file photograph illustrating Claude branding against a keyboard, supplied with The Washington Post report. It does not depict Cathedral’s test or compromised systems.

Published 26 Oct 2026 · 13:49 UTC

The Washington Post ↗ · Source dated 26 Oct 2026

Browse all Live updates · Read Features