Mozilla: Anthropic’s Mythos found 271 zero-day vulnerabilities in Firefox 150
Summary
Ars Technica reports that Mozilla states Anthropic’s Mythos Preview identified 271 security vulnerabilities in Firefox 150 during early access. CTO Bobby Holley claims Mythos can accelerate vulnerability discovery and tilt the balance toward defenders, noting it found far more bugs than the previous Opus model. The article frames this AI-assisted approach within ongoing debates about AI’s role in security testing and open-source software security.