CVE-2026-2800
published 2026-02-24CVE-2026-2800: Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
PriorityP345critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.31%
23.0th percentile
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | — | — |
| mozilla | firefox | < 148.0 | 148.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 148.0 | 148.0 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv9.8CRITICAL
vendor_debian9.8LOW
vendor_redhat9.8CRITICAL
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OSV
CVE-2026-2800: Spoofing issue in the WebAuthn component in Firefox for Android
osv·2026-02-24·CVSS 9.8
CVE-2026-2800 [CRITICAL] CVE-2026-2800: Spoofing issue in the WebAuthn component in Firefox for Android
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 148 and Thunderbird < 148.
GHSA
GHSA-wcpx-2xqg-ff43: Spoofing issue in the WebAuthn component in Firefox for Android
ghsa_unreviewed·2026-02-24
CVE-2026-2800 [CRITICAL] CWE-290 GHSA-wcpx-2xqg-ff43: Spoofing issue in the WebAuthn component in Firefox for Android
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 148.
Red Hat
firefox: thunderbird: Spoofing issue in the WebAuthn component in Firefox for Android
vendor_redhat·2026-02-24·CVSS 9.8
CVE-2026-2800 [CRITICAL] firefox: thunderbird: Spoofing issue in the WebAuthn component in Firefox for Android
firefox: thunderbird: Spoofing issue in the WebAuthn component in Firefox for Android
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 148 and Thunderbird < 148.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Spoofing issue in the WebAuthn component in Firefox for Android
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package: thunderbird (Red Hat Enterprise Linux 1
Debian
CVE-2026-2800: firefox - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerabil...
vendor_debian·2026·CVSS 9.8
CVE-2026-2800 [CRITICAL] CVE-2026-2800: firefox - Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerabil...
Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability affects Firefox < 148 and Thunderbird < 148.
Scope: local
sid: resolved
Mozilla
Mozilla Foundation Security Advisory 2026-16: CVE-2026-2800
vendor_mozilla·CVSS 9.8
CVE-2026-2800 [CRITICAL] Mozilla Foundation Security Advisory 2026-16: CVE-2026-2800
Mozilla Foundation Security Advisory 2026-16
CVE: CVE-2026-2800
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 148
Mozilla
Mozilla Foundation Security Advisory 2026-13: CVE-2026-2800
vendor_mozilla·CVSS 9.8
CVE-2026-2800 [CRITICAL] Mozilla Foundation Security Advisory 2026-13: CVE-2026-2800
Mozilla Foundation Security Advisory 2026-13
CVE: CVE-2026-2800
Product: Firefox
Impact: high
Fixed in: Firefox 148
No detection rules found.
No public exploits indexed.
2026-02-24
Published