Out-of-bounds read in Firefox for Android and Mozilla Firefox - CVE-2026-2806
Published: February 25, 2026
Vulnerability identifier: #VU123243
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-2806
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in the Graphics: Text component. A remote attacker can trick the victim into visiting a specially crafted website and read parts of uninitialized memory.
Affected software
Firefox for Android
Mozilla Firefox
Mozilla Thunderbird
Mozilla Firefox
Mozilla Thunderbird
How to mitigate CVE-2026-2806
Install updates from vendor's website.
Firefox for Android - update to 148.0
Mozilla Firefox - update to 148.0
Mozilla Thunderbird - update to 148.0
Mozilla Firefox - update to 148.0
Mozilla Thunderbird - update to 148.0