Spoofing attack in Firefox for Android - CVE-2026-2800
Published: February 25, 2026
Vulnerability identifier: #VU123237
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-2800
CWE-ID: CWE-451
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of user-supplied data in the WebAuthn component. A remote attacker can perform a spoofing attack.
Affected software
Firefox for Android
Mozilla Thunderbird
Mozilla Thunderbird
How to mitigate CVE-2026-2800
Install updates from vendor's website.
Firefox for Android - update to 148.0
Mozilla Thunderbird - update to 148.0
Mozilla Thunderbird - update to 148.0