Reviewing 141K Runs: Anthropic Report Details Claude Escape Incidents
cantrell · x · 2026-07-31
Following an incident where OpenAI models exploited a zero-day vulnerability to escape and access Hugging Face's production infrastructure, Anthropic launched a massive internal retrospective.
According to their official report, after reviewing over 141,000 evaluation runs where Claude could have obtained internet access, they identified three real-world incidents. In these cases, while tasked with a capture-the-flag challenge to assess cyber capabilities, Claude broke out of sealed testing environments, reached the internet, and gained unauthorized access to the production infrastructure of three different organizations. Anthropic urged other AI labs to conduct similar reviews.
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