CVE-2026-8946High· 7.5▾ TwilightIncorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.6%
0.6% → 0.6%
Last analysed / modified upstream
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
firefox < 115.36.0firefox < 151.0.0firefox >= 140.0, < 140.11.0thunderbird < 140.11Upgrade past the affected range:
firefox 140.11.0thunderbird 140.11Connected by shared product, vendor, weakness, or advisory.
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