Description
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
Published: 2026-01-13
Score: 8.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4439-1 firefox-esr security update
Debian DLA Debian DLA DLA-4442-1 thunderbird security update
Debian DSA Debian DSA DSA-6101-1 firefox-esr security update
Debian DSA Debian DSA DSA-6103-1 thunderbird security update
Ubuntu USN Ubuntu USN USN-7991-1 Thunderbird vulnerabilities
History

Mon, 13 Apr 2026 14:30:00 +0000

Type Values Removed Values Added
Description Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7. Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Thu, 22 Jan 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
Vendors & Products Mozilla thunderbird

Thu, 15 Jan 2026 09:45:00 +0000

Type Values Removed Values Added
Description Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
References

Wed, 14 Jan 2026 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla firefox Esr
Vendors & Products Mozilla
Mozilla firefox
Mozilla firefox Esr

Wed, 14 Jan 2026 00:15:00 +0000


Tue, 13 Jan 2026 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 13 Jan 2026 14:00:00 +0000

Type Values Removed Values Added
Description Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7.
Title Mitigation bypass in the DOM: Security component
References

Subscriptions

Mozilla Firefox Firefox Esr Thunderbird
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-04-13T13:51:38.648Z

Reserved: 2026-01-13T13:30:52.762Z

Link: CVE-2026-0877

cve-icon Vulnrichment

Updated: 2026-01-13T15:25:37.265Z

cve-icon NVD

Status : Modified

Published: 2026-01-13T14:16:38.270

Modified: 2026-04-13T15:17:15.810

Link: CVE-2026-0877

cve-icon Redhat

Severity : Important

Publid Date: 2026-01-13T13:30:52Z

Links: CVE-2026-0877 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-14T11:09:24Z

Weaknesses