NULL pointer dereference in Firefox for Android and Mozilla Firefox - CVE-2026-16367
Published: July 22, 2026
Vulnerability identifier: #VU138997
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-2026-16367
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escape the sandbox.
The vulnerability exists due to invalid pointer dereference in the Disability Access APIs component when interacting with accessibility features. A remote attacker can trigger crafted interaction with accessibility features to escape the sandbox.
Affected software
Firefox for Android
Mozilla Firefox
Mozilla Thunderbird
Mozilla Firefox
Mozilla Thunderbird
How to mitigate CVE-2026-16367
Install security update from vendor's website.
Firefox for Android - update to 153.0
Mozilla Firefox - update to 153.0
Mozilla Thunderbird - update to 153.0
Mozilla Firefox - update to 153.0
Mozilla Thunderbird - update to 153.0