CVE-2026-4704

Denial-of-service in the WebRTC: Signaling component

State: Published
Severity: 7.5 High
Published: Mar 24, 2026
Updated: Apr 13, 2026
Reserved: Mar 23, 2026

Description

Denial-of-service in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
FirefoxMozilla	140.9 through 140.*Not affected 149 and laterNot affected
ThunderbirdMozilla	140.9 through 140.*Not affected 149 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2014868
https://www.mozilla.org/security/advisories/mfsa2026-20/
https://www.mozilla.org/security/advisories/mfsa2026-22/
https://www.mozilla.org/security/advisories/mfsa2026-23/
https://www.mozilla.org/security/advisories/mfsa2026-24/

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