CVE-2026-92039

Mitigation bypass in the DOM: Notifications component

State: Published
Severity: 6.3 Medium
Published: Sep 15, 2026
Updated: Sep 21, 2026
Reserved: Sep 15, 2026

Description

Mitigation bypass in the DOM: Notifications component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

Scores

CVSS	Score	Vector	Source
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L	CISA-ADP

Weaknesses

CWE-693 Protection Mechanism Failure

Affected Products

Product	Versions
FirefoxMozilla	153.3 through 153.*Not affected 156 and laterNot affected
ThunderbirdMozilla	153.3 through 153.*Not affected 156 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2001265
https://www.mozilla.org/security/advisories/mfsa2026-90/
https://www.mozilla.org/security/advisories/mfsa2026-93/
https://www.mozilla.org/security/advisories/mfsa2026-94/
https://www.mozilla.org/security/advisories/mfsa2026-96/

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