Description
Webauthn Framework 3.3.x before 3.3.4 has Incorrect Access Control. An attacker that controls a user's system is able to login to a vulnerable service using an attached FIDO2 authenticator without passing a check of the user presence.
Affected products
spomky-labs: webauthn framework; spomky-labs: webauthn framwork
References4
- github.com/web-auth/webauthn-framework/releases Release NotesThird Party Advisory
- www.fzi.de/en/news/news/detail-en/artikel/fsa-2021-1-fehlende-u… Third Party Advisory
- github.com/web-auth/webauthn-framework/releases Release NotesThird Party Advisory
- www.fzi.de/en/news/news/detail-en/artikel/fsa-2021-1-fehlende-u… Third Party Advisory
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 2% percentile: 79 · as of 7 November 2026
- CWE
- CWE-287
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.