CVE-2026-2800

Spoofing issue in the WebAuthn component in Firefox for Android

Critical · published February 24, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
50.2
In the wild
Unconfirmed
What it is

Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00644 · 50.2th percentile
Published
2026-02-24T13:33Z
EPSS history
Timeline
  • 24 FEB 13:33Z
    Spoofing issue in the WebAuthn component in Firefox for Android
    cvelistv5