Ad

CVE-2026-2800

CRITICAL CVSS 3.1: 9.8 EPSS 0.06%
Updated Feb 25, 2026
Mozilla
Parameter Value
CVSS 9.8 (CRITICAL)
Affected Versions before 148.0
Fixed In 148.0
Vendor Mozilla
Public PoC No

Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 148 and Thunderbird < 148.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Mozilla Firefox
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
148.0
Mozilla Thunderbird
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
148.0