Use-after-free in Mozilla products - CVE-2026-92022
Published: September 15, 2026
Vulnerability identifier: #VU150047
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92022
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause memory corruption.
The vulnerability exists due to use-after-free in the DOM: HTML Parser component when parsing web content. A remote attacker can trick the victim into visiting a specially crafted website to cause memory corruption.
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-2026-92022
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