GLM 5.3 builds full Firefox exploit chains with zero human input
Key point
According to Epoch AI researchers, the open-weight model GLM 5.3 autonomously built exploit chains for Firefox in under 48 hours by exploiting security fixes.
According to researchers from Epoch AI, the widely available open-weight model GLM 5.3 turned public security fixes for Firefox into working exploits before updates reached users. The model reportedly built full Firefox exploit chains with zero human input in under 48 hours.
The model autonomously compromised six Firefox releases without triggering safeguards from any provider tested. This process cost approximately $1,000 in API fees per release, according to the report.
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