Mozilla used advanced AI models from Anthropic, including an early version of Claude Mythos, to identify and fix 271 vulnerabilities in Firefox 150. This represents a major shift in cybersecurity defense, suggesting AI could help defenders decisively outpace attackers. The scale of findings was unprecedented, forcing reprioritization but offering hope for reducing zero-days long-term.
Background
Zero-day vulnerabilities are undisclosed software flaws that attackers can exploit before developers have a patch. Major browsers like Firefox are high-value targets due to their widespread use and internet exposure.
- Source
- Lobsters
- Published
- Apr 22, 2026 at 03:11 AM
- Score
- 8.0 / 10