Moole Vulnerability Database

Find real vulnerabilities before they ship

High

CVE-2026-0877

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.

VectorNETWORK

PublishedJan 13, 2026, 14:16

Published Bysecurity@mozilla.org

Base Score

Score8.1

Affected Versions

No affected versions found.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1999257
https://www.mozilla.org/security/advisories/mfsa2026-01/
https://www.mozilla.org/security/advisories/mfsa2026-02/
https://www.mozilla.org/security/advisories/mfsa2026-03/
https://www.mozilla.org/security/advisories/mfsa2026-04/
https://www.mozilla.org/security/advisories/mfsa2026-05/

Weakness Type

CWE-693

CVSS Metrics

Base Score

8.1

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Base SeverityHigh

Version

3.1

Attack Vector (AV)

NETWORK