CVE-2026-109734

Published: Oct 13, 2026Modified: Oct 19, 2026Deferred

8.1

Vector

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

Exploitability: 2.8 / Impact: 5.2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

Related CWEs

CWE-693

Protection Mechanism Failure

The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

References (5)

https://bugzilla.mozilla.org/show_bug.cgi?id=1926318

Source: security@mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-106/

Source: security@mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-108/

Source: security@mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-109/

Source: security@mozilla.org

https://www.mozilla.org/security/advisories/mfsa2026-110/

Source: security@mozilla.org

Timeline

No history available yet.