CVE-2026-4693highCWE-754CWE-823

CVE-2026-4693: high-severity vulnerability in Mozilla Firefox

Incorrect boundary conditions in the Audio/Video: Playback component

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.5epss 0.7%
Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Mozilla · FirefoxMozilla · Thunderbird
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