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CVE-2026-2803

Information disclosure, mitigation bypass in the Settings UI component

CVSS 7.5 HIGHEPSS 0.3%CWE-200CWE-693
Information disclosure, mitigation bypass in the Settings UI component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products
Mozilla · FirefoxMozilla · Thunderbird

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References
https://bugzilla.mozilla.org/show_bug.cgi?id=2012012https://www.mozilla.org/security/advisories/mfsa2026-13/https://www.mozilla.org/security/advisories/mfsa2026-16/