CVE-2025-12150
Org.keycloak/keycloak-services: webauthn attestation statement verification bypass
CVSS Score
3.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-347 |
| Vendor | keycloak |
| Product | keycloak |
| Published | Feb 27, 2026 |
| Last Updated | Mar 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
Keycloak / keycloak
0 < 26.4.4
Red Hat / Red Hat build of Keycloak 26.2
All versions affected Red Hat / Red Hat build of Keycloak 26.2
All versions affected Red Hat / Red Hat build of Keycloak 26.2
All versions affected Red Hat / Red Hat build of Keycloak 26.2.11
All versions affected Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4
All versions affected Red Hat / Red Hat build of Keycloak 26.4.4
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2025:21370 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:21371 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:22088 access.redhat.com: https://access.redhat.com/errata/RHSA-2025:22089 access.redhat.com: https://access.redhat.com/security/cve/CVE-2025-12150 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2406192 github.com: https://github.com/keycloak/keycloak/issues/43723
Credits
Red Hat would like to thank Stefan Kunz (cnlab) for reporting this issue.