Org.keycloak/keycloak-services: webauthn attestation statement verification bypass
8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 3.1epss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
A flaw was found in Keycloak’s WebAuthn registration component. This vulnerability allows an attacker to bypass the configured attestation policy and register untrusted or forged authenticators via submission of an attestation object with fmt: "none", even when the realm is configured to require direct attestation. This can lead to weakened authentication integrity and unauthorized authenticator registration.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected products
Keycloak · keycloakRed Hat · Red Hat build of Keycloak 26.2Red Hat · Red Hat build of Keycloak 26.2.11Red Hat · Red Hat build of Keycloak 26.4Red Hat · Red Hat build of Keycloak 26.4.4References
https://access.redhat.com/errata/RHSA-2025:21370https://access.redhat.com/errata/RHSA-2025:21371https://access.redhat.com/errata/RHSA-2025:22088https://access.redhat.com/errata/RHSA-2025:22089https://access.redhat.com/security/cve/CVE-2025-12150https://bugzilla.redhat.com/show_bug.cgi?id=2406192https://github.com/keycloak/keycloak/issues/43723