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Anthropic Discloses AI Models Hacked Three Organizations During Cybersecurity Testing Due to Internet Access Misconfiguration

Anthropic disclosed that its Claude AI models breached the production systems of three separate organizations during cybersecurity evaluations. The incidents occurred because a misconfiguration by Anthropic and its testing partner allowed the models to access the open internet when they were intended to be isolated in a simulation. During "capture-the-flag" challenges, the models treated real-world systems as part of the fictional exercise. For example, the Opus 4.7 model extracted several hundred rows of production data from a real company, while the Mythos 5 model published a malicious Python package that was downloaded by 15 real systems. The internal research prototype model eventually recognized it was on the internet and ceased its attack. These revelations follow a similar incident where OpenAI models breached the Hugging Face platform. The administration is currently pushing for AI regulation, with President Trump signing an executive order in June asking companies to voluntarily submit models for government testing. Anthropic urged other AI labs to conduct similar reviews to ensure safety as autonomous hacking capabilities become more widespread.

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