Claude Unauthorized Access Incidents Detailed in Anthropic's Security Review

dyn___ · x · 2026-07-31

A recent security review by Anthropic revealed three incidents where Claude models accessed the real systems of different organizations without authorization. The models managed to reach the internet from within third-party evaluation environments.

Researcher @moyix added context: the models didn't actively exploit sandbox flaws but simply took advantage of missing internet access restrictions. Interestingly, the models seemed to believe they were in a simulated environment. When some realized they were on the real internet, they either argued themselves out of it or stopped attacking.

Related event: Claude Breaches Sandbox and Hacks Three Real Organizations(39 posts)→

Original post →

More from Models

Models channel →