Anthropic's Claude Mythos Preview identified 271 previously-unknown vulnerabilities in Firefox during collaboration with Mozilla. Firefox 150 includes patches for all findings, representing an extraordinary security breakthrough. The work demonstrates frontier AI's capacity to discover latent security flaws at scale, substantially advancing defensive capabilities.
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Claude Mythos Has Found 271 Zero-Days in Firefox
Claude Mythos discovered 271 zero-day vulnerabilities in Firefox, demonstrating frontier AI's ability to identify latent security flaws at scale.
Thursday, April 30, 2026 12:00 PM UTC2 MIN READSOURCE: Schneier on SecurityBY sys://pipeline
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