Firefox security advisories
5 threat alerts tracking vulnerabilities and security advisories that affect Firefox products.
Vulnios monitors Firefox CVE feeds, vendor advisories, CISA KEV listings, and exploit-prediction data continuously. Each alert below is enriched with severity, exploitation status, affected products, and a remediation path. Use this page to scan recent Firefox security news in one place, or click into an individual alert for full detail.
Claude Mythos Has Found 271 Zero-Days in Firefox
That’s a lot. No, it’s an extraordinary number: Since February, the Firefox team has been working around the clock using frontier AI models to find and fix latent security vulnerabilities in the brows
criticalFirefox Vulnerability Allows Tor User Fingerprinting
The vulnerability is tracked as CVE-2026-6770 and it has been patched with the release of Firefox 150 and Tor 15.0.10. The post Firefox Vulnerability Allows Tor User Fingerprinting appeared first on S
criticalCVE-2026-6770Week in review: Claude Mythos finds 271 Firefox flaws, Vercel breach - Help Net Security
Week in review: Claude Mythos finds 271 Firefox flaws, Vercel breach Help Net Security
highClaude Mythos AI Model Uncovers 271 Zero-Day Vulnerabilities in Firefox - cyberpress.org
Claude Mythos AI Model Uncovers 271 Zero-Day Vulnerabilities in Firefox cyberpress.org
highClaude Mythos Finds 271 Firefox Vulnerabilities
All the flaws could have also been found by an elite human researcher, according to Mozilla. The post Claude Mythos Finds 271 Firefox Vulnerabilities appeared first on SecurityWeek. ]]>
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