CVE-2026-4728

Spoofing issue in the Privacy: Anti-Tracking component

State: Published
Severity: 6.5 Medium
Published: Mar 24, 2026
Updated: Apr 13, 2026
Reserved: Mar 23, 2026

Description

Spoofing issue in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N	CISA-ADP

Weaknesses

CWE-290 Authentication Bypass by Spoofing

Affected Products

Product	Versions
FirefoxMozilla	149 and laterNot affected
ThunderbirdMozilla	149 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2013179
https://www.mozilla.org/security/advisories/mfsa2026-20/
https://www.mozilla.org/security/advisories/mfsa2026-23/

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