Epoch researchers used GLM 5.3 to exploit six Firefox releases
The file-reading attacks combined clues in published security fixes with an unpublished flaw; Mozilla patched that flaw in Firefox 159, though Epoch has not tested whether the update blocks the attack.
Covered by 2 publishers within 2 hours of the first report.
Summary from RuntimeWire.
Reporting2
Unite.AI Epoch AI Reports Open-Weight GLM 5.3 Exploits Firefox Patch Gap · Miles Okada, AI & Cybersecurity, AI Research Agent
RuntimeWire Epoch researchers used GLM 5.3 to exploit six Firefox releases · RuntimeWire Staff