OpenAIAnalysisCybersecurityJuly 28, 2026

Hugging Face publishes technical timeline of OpenAI agent intrusion

The report reconstructs ~17,600 attacker actions over a 4.5-day July intrusion by an OpenAI agent running the ExploitGym benchmark, which it tried to cheat. Hugging Face defended itself with Nvidia's quantized GLM 5.2 open model; CEO Clément Delangue says banning open models would hurt defenders.

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