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# Mozilla's AI vulnerability tool finds 271 Firefox bugs humans missed
- URL: https://adjacent.media/signals/mozillas-ai-vulnerability-tool-finds-271-firefox-bugs-humans-missed/
- Published: 2026-05-08T16:14:18.000Z
- Updated: 2026-05-08T16:14:18.000Z
- Description: Mozilla’s Mythos experiment shows AI-powered vulnerability detection is finding hundreds of real bugs in mature, well-audited codebases that security researchers missed.
- Author: Jonathan Greene
- Tags: #signal, theme-ai, AI & ML, ai safety, ai capabilities

Source: [Nate’s Substack](https://open.substack.com/pub/natesnewsletter/p/ai-code-trust-verification-shift)

Mozilla's Mythos experiment shows AI-powered vulnerability detection is finding hundreds of real bugs in mature, well-audited codebases that security researchers missed. This doesn't solve the human attacker problem, but it shifts the competitive math: organizations now face pressure to adopt AI tooling as table stakes rather than optional. Security posture increasingly depends on access to frontier AI capabilities, which risks widening the gap between well-resourced tech companies and those who can't afford custom vulnerability-detection models.