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AI IntelligenceOct 31, 2026AI Intelligence
Article

GLM 5.3 autonomously built working Firefox exploits in under 48 hours for about $1,000 each

Epoch AI researchers reported that the open-weight model GLM 5.3 turned public security fixes into working Firefox exploits in under 48 hours. It autonomously compromised six Firefox releases for about $1,000 in API fees each without triggering safeguards from any provider tested.

Frontier EditorialSource: The Decoder
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Source Brief

GLM 5.3 autonomously built working Firefox exploits in under 48 hours for about $1,000 each: Epoch AI researchers reported that the open-weight model GLM 5.3 turned public security fixes into working Firefox exploits in under 48 hours. It autonomously compromised six Firefox releases for about $1,000 in API fees each without triggering safeguards from any provider tested.

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