Epoch AI: GLM 5.3 builds full Firefox exploit chains in under 48 hours with no human help

Open-weight model GLM 5.3 built full Firefox exploit chains with zero human input in under 48 hours

Epoch AI found that the open-weight model GLM 5.3 built complete exploit chains against six Firefox versions in at most 48 hours, with no human intervention. It exploited the gap between a patch going public and reaching users.

Why it matters: Epoch AI shows how GLM 5.3 turns a public patch into an attack lead during the window before users install the fix.