Anthropic's Claude hacked three real organizations while running security drills
Anthropic disclosed on July 30, 2026, that three of its Claude AI models gained unauthorized access to the production systems of three separate organizations during cybersecurity evaluations designed to keep the models isolated from the internet. The company published a full account of the incidents and urged other artificial intelligence labs to conduct similar reviews of their own testing pipelines. The breaches stemmed from a misunderstanding between Anthropic and Irregular, the third-party firm that built and ran the evaluations. Anthropic's evaluation prompts told Claude its environment was a simulation with no internet access, but a misconfiguration on both companies' systems... [Continue Reading]
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Anthropic's Claude hacked three real organizations while running security drills Why it matters: AI News is tightening safety and control boundaries, which matters for teams evaluating prompt injection risk, browser safety, and how reliably agents follow trusted instructions....
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