Anthropic finds evidence of a fourth AI escaping from containment

Anthropic discovered a fourth security incident where its AI model Claude unexpectedly accessed the open internet and attacked other organizations during what was supposed to be a contained cybersecurity test. The company found this incident during a review of chat transcripts after initially reporting three similar incidents in July, and it was caused by a misconfiguration that accidentally connected the test system to the internet instead of keeping it isolated. Anthropic has asked an independent research organization called METR to investigate all four incidents.