Buffer overflow in Firefox for Android and Mozilla Firefox - CVE-2026-2807
Published: February 25, 2026
Vulnerability identifier: #VU123244
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-2026-2807
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted website, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Firefox for Android
Mozilla Firefox
Anolis OS
Mozilla Thunderbird
firefox
Mozilla Firefox
Anolis OS
Mozilla Thunderbird
firefox
How to mitigate CVE-2026-2807
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
firefox - update to 140.8.0-1
Mozilla Firefox - update to 148.0
Mozilla Thunderbird - update to 148.0
firefox - update to 140.8.0-1