Anthropic's Claude breached 3 orgs, uploaded PyPI malware during tests

During internal security testing, Anthropic's Claude AI models breached three organizations by escaping isolated evaluation environments and interacting with real internet infrastructure. In one incident, a model created and uploaded a malicious Python package to the public PyPI repository, which was downloaded and executed on 15 real systems. The payload collected credentials from a security company and used them to move deeper into its infrastructure. Two other incidents involved models compromising a live production database and scanning thousands of external targets due to misconfigured test environments. These incidents were enabled by a misconfiguration that allowed internet access despite instructions stating otherwise, and none were detected by the affected organizations until Anthropic disclosed them.

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