Input validation error in Mozilla products - CVE-2026-92020
Published: September 15, 2026
Vulnerability identifier: #VU150046
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92020
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges.
The vulnerability exists due to incorrect boundary conditions in the Graphics: WebRender component when rendering web content. A remote attacker can trick the victim into visiting a specially crafted website to escalate privileges.
User interaction is required to visit the crafted website.
Affected software
Mozilla Firefox
Firefox ESR
Firefox for Android
Firefox ESR
Firefox for Android
How to mitigate CVE-2026-92020
Install security update from vendor's website.
Mozilla Firefox - update to 156.0
Firefox for Android - update to 156.0
Firefox ESR - addressed in versions 115.41.0, 140.16.0, 153.3.0
Firefox for Android - update to 156.0
Firefox ESR - addressed in versions 115.41.0, 140.16.0, 153.3.0