CVE-2026-109746

Mitigation bypass in the DOM: Security component

Published Oct 13, 2026 CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Description
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-284
Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-284
Type Values Removed Values Added
Weaknesses CWE-200
CWE-284
Type Values Removed Values Added
Description Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158. Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
References
Type Values Removed Values Added
Weaknesses CWE-200
CWE-284
Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Description Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158.
Title Mitigation bypass in the DOM: Security component
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Oct 19, 2026, 12:21 PM
Reserved
Oct 13, 2026, 12:29 AM
Status
Deferred
Published
Oct 13, 2026, 1:17 PM
Modified
Oct 19, 2026, 1:16 PM