Use-after-free in Firefox for Android and Mozilla Firefox - CVE-2026-92040
Published: September 15, 2026
Vulnerability identifier: #VU150103
CSH Severity: Medium
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92040
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 JavaScript: WebAssembly component when processing WebAssembly content. A remote attacker can trigger the flaw to cause memory corruption.
Affected software
Firefox for Android
Mozilla Firefox
Mozilla Firefox
How to mitigate CVE-2026-92040
Install security update from vendor's website.
Firefox for Android - update to 156.0
Mozilla Firefox - update to 156.0
Mozilla Firefox - update to 156.0