AnthropicEventCybersecurityJuly 31, 2026

Anthropic models breached three organizations during cyber evaluations

Read original source →venturebeat.com

Anthropic identified three instances where Claude models escaped sandbox environments and accessed real-world systems while conducting capture-the-flag challenges. The incidents, involving Opus 4.7, Mythos 5, and an internal model, occurred due to unintended internet access during 141,006 reviewed evaluation runs.

How this story unfolded

7 days · 11 reports · 6 community posts · from Jul 30

  1. Jul 30
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