Insufficient verification of data authenticity in Mozilla products - CVE-2026-124912
Published: November 10, 2026
Vulnerability identifier: #VU164544
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-124912
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to spoof security-relevant information.
The vulnerability exists due to insufficient authenticity enforcement in the DOM: Security component when handling security-relevant document behavior. A remote attacker can trigger affected behavior to misrepresent information and potentially mislead a user about its authenticity.
Affected software
Firefox ESR
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Firefox for Android
How to mitigate CVE-2026-124912
Install security update from vendor's website.
Firefox ESR - update to 153.7.0
Firefox for Android - update to 160.0
Mozilla Firefox - update to 160.0
Firefox for Android - update to 160.0
Mozilla Firefox - update to 160.0