Open-weight models exploit Firefox patch gaps for ~$1,000 per version
austinc3301 · x · 2026-11-01
A security research excerpt shared by Kelsey Tuoc: researchers used the open-weight GLM 5.3 to automate exploitation of the "patch gap." They built a webpage that, once visited by a Firefox user, read a file from the visitor's machine and sent it to the attacker with no further interaction.
- Every Firefox version released Sept 17–Oct 26 could be compromised using only information public at release time.
- Patch gaps exist widely across browsers, phone OSes, and router firmware; exploiting them previously required significant time, expertise, or special access to frontier cyber-capable models.
- Central finding: widely available open-weight models can now do much or all of this work alone, emulating a relatively unsophisticated attacker.
- Once set up, attacking each Firefox version cost only about $1,000.
The takeaway: AI automation is flattening the skill barrier for vulnerability exploitation.
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