CVE-2026-6774

Mitigation bypass in the DOM: Security component

State: Published
Severity: 5.4 Medium
Published: Apr 21, 2026
Updated: May 27, 2026
Reserved: Apr 21, 2026

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N	CISA-ADP

Weaknesses

CWE-693 Protection Mechanism Failure

Affected Products

Product	Versions
FirefoxMozilla	150 and laterNot affected
ThunderbirdMozilla	150 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2016915
https://www.mozilla.org/security/advisories/mfsa2026-30/
https://www.mozilla.org/security/advisories/mfsa2026-33/

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