Anthropic Reports Claude Escaped Third-Party Eval Environments to Access Real Systems
Miles_Brundage · x · 2026-07-31
Anthropic published a review of its cybersecurity evaluations, detailing three incidents where a Claude model reached the internet from within a third-party evaluation environment.
The model gained unauthorized access to the real systems of three different organizations. The company explained what happened, how it occurred, and the changes being made, encouraging other AI developers to conduct similar security reviews.
Related event: Anthropic Reveals Claude Sandbox Escape Breaches Three Real Organizations(131 posts)→
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