GLM 5.3 breaks Firefox using the patch gap
What happened
On October 30, 2026, Hacker News' front page covered an Epoch AI experiment on the open-weight model GLM 5.3. The experiment found the model could break six recent versions of Firefox by exploiting the patch gap, and read and exfiltrate local files without further user interaction. The report ties the capability to the patch gap across several recent versions. It does not list the specific version numbers, the length of the patch gap, the scope of file access, or any follow-up fixes.
Written by AI from the coverage · updated 1 hour ago
Coverage
Follow the reports to see the story from different sides.
- Hacker News front pagePickStudy finds GLM 5.3 can break Firefox by exploiting the patch time gap
An Epoch AI experiment found that the open-weight model GLM 5.3 can break six recent versions of Firefox by exploiting the gap between a patch landing and users updating. It reads and exfiltrates local files with no further user interaction.
Heat over time
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