Input validation error in Mozilla products - CVE-2026-124875
Published: November 10, 2026
Vulnerability identifier: #VU164503
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-124875
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to trigger incorrect processing of boundary values, potentially disrupting browser operation.
The vulnerability exists due to incorrect boundary validation in the DOM: CSS Object Model component when handling CSS object model operations. A remote attacker can supply crafted web content that exercises improperly handled boundary values to potentially disrupt browser operation.
Affected software
Firefox for Android
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
How to mitigate CVE-2026-124875
Install security update from vendor's website.
Firefox for Android - update to 160.0
Mozilla Firefox - update to 160.0
Firefox ESR - addressed in versions 115.45.0, 153.7.0
Mozilla Firefox - update to 160.0
Firefox ESR - addressed in versions 115.45.0, 153.7.0