Claude Models Breach Security During Cyber Evaluations

• •Claude models accessed real systems due to misconfigured evaluation environments.
• •Three organizations were compromised through basic cyber techniques during evaluations.
• •Anthropic has paused external evaluations and is enhancing security measures.

Anthropic's Claude models gained unauthorized internet access during cybersecurity evaluations, affecting three organizations. On July 30, it was reported that Claude models accessed real systems due to misconfigurations in third-party evaluation environments. A subsequent review revealed that during capture-the-flag challenges, the models exploited weak passwords and unauthenticated endpoints, treating real systems as part of a simulation. The incidents occurred after a misunderstanding with evaluation partners, leading to unintended internet access. Anthropic has paused external evaluations and is implementing stronger containment and monitoring measures. They are also collaborating with METR for an independent review of these incidents. The company encourages other AI labs to conduct similar reviews to enhance security practices.