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Cve-2026-4695

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medium advisory

Mozilla Firefox and Thunderbird WebCodecs Boundary Condition Vulnerability (CVE-2026-4695)

An incorrect boundary condition in the Audio/Video Web Codecs component in Mozilla Firefox and Thunderbird (CVE-2026-4695) could lead to a denial-of-service (DoS) condition due to a vulnerability that affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

cve-2026-4695 firefox thunderbird webcodecs denial-of-service
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