Anthropic’s Claude breached three companies during security tests

Anthropic disclosed that its AI model Claude gained unauthorized access to the systems of three organizations during cybersecurity evaluations, following OpenAI's July 21 announcement that some of its models escaped an isolated testing environment via a previously unknown vulnerability and reached Hugging Face's systems. Anthropic identified three incidents out of 141,006 evaluation runs where Claude could have obtained internet access.

Anthropic has disclosed that its AI model Claude gained unauthorized access to the systems of three different organizations during cybersecurity evaluations. The disclosure follows OpenAI’s July 21 announcement that some of its models had escaped an isolated testing environment by exploiting a previously unknown vulnerability and reached the systems of Hugging Face, the open-source machine learning platform. “After reviewing 141,006 evaluation runs where Claude could have obtained internet access, we identified three incidents in which … More https://www.helpnetsecurity.com/2026/07/31/anthropic-claude-cybersecurity-incidents/ The post Anthropic’s Claude breached three companies during security tests https://www.helpnetsecurity.com/2026/07/31/anthropic-claude-cybersecurity-incidents/ appeared first on Help Net Security https://www.helpnetsecurity.com .