CVE-2026-2802

Race condition in the JavaScript: GC component

State: Published
Severity: 4.2 Medium
Published: Feb 24, 2026
Updated: Apr 13, 2026
Reserved: Feb 19, 2026

Description

Race condition in the JavaScript: GC component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Scores

CVSS	Score	Vector	Source
3.1	4.2 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Affected Products

Product	Versions
FirefoxMozilla	148 and laterNot affected
ThunderbirdMozilla	148 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2011069
https://www.mozilla.org/security/advisories/mfsa2026-13/
https://www.mozilla.org/security/advisories/mfsa2026-16/

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