🛡️ CVE-2026-4693 — firefox
Description
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.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.
Affected software
CVE-2026-4693 is recorded against 1 package.
- firefox (from 128.0 up to 140.9.0)
Timeline and source
Published on 24 March 2026 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
bugzilla.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
www.mozilla.org
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
access.redhat.com
CVE-2026-4693 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| firefox | 128.0 | 140.9.0 |
References
Similar Threats
- Unknown ALSA-2022:8580
- Unknown ALSA-2022:8554
- Unknown ALSA-2022:7070
- Unknown ALSA-2022:7071
- Unknown ALSA-2022:7020
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
Site Security Check
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CVE-2026-4693 is rated CVSS 7.5 High. BotEraser scans your installation against known CVE records and tells you whether this vulnerability applies to the versions you actually run.
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