Mozilla: Anthropic’s Mythos Found 271 Zero-Day Vulnerabilities in Firefox 150

Mozilla reported that Anthropic’s AI model Mythos Preview identified 271 security vulnerabilities in the unreleased Firefox 150 source code, significantly more than previous AI models. Mozilla’s CTO stated that AI tools like Mythos could decisively shift cybersecurity defenses by making vulnerability detection faster and more efficient, potentially transforming how software security is maintained.

https://arstechnica.com/ai/2026/04/mozilla-anthropics-mythos-found-271-zero-day-vulnerabilities-in-firefox-150/

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