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9.8 Critical

CVE-2026-2800 Spoofing issue in the WebAuthn component in Firefox for Android

Description

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

Affected products and versions

Product	Affected versions	Fixed in
Firefox 148	earliest → < 148	148
Thunderbird 148	earliest → < 148	148

References

bugzilla.mozilla.org bugzilla.mozilla.org
www.mozilla.org www.mozilla.org
www.mozilla.org www.mozilla.org

Timeline

Published February 24, 2026
Last modified April 13, 2026

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