Anthropic’s Claude found 22 vulnerabilities in Firefox over two weeks
infonewsLLM-Specific
securityresearch
Source: TechCrunch (Security)March 6, 2026
Summary
Anthropic used Claude Opus 4.6 (an advanced AI model) to test Firefox's code and discovered 22 vulnerabilities, including 14 severe ones, over two weeks. Most of these bugs have already been fixed in Firefox 148 released in February, though some fixes will come in a later update. The AI was much better at finding security problems than creating working exploits to demonstrate them.
Solution / Mitigation
Most vulnerabilities have been fixed in Firefox 148 (released February). A few remaining fixes will be addressed in the next release.
Classification
Attack SophisticationModerate
Impact (CIA+S)
integrity
AI Component TargetedModel
Affected Vendors
Anthropic
Related Issues
Original source: https://techcrunch.com/2026/03/06/anthropics-claude-found-22-vulnerabilities-in-firefox-over-two-weeks/
First tracked: March 6, 2026 at 03:00 PM
Classified by LLM (prompt v3) · confidence: 92%