Description
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 breakdown
CVSS 3.1
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected products
- Keycloak / Keycloak0 – 26.4.4
- RedHat / build_of_keycloak26.4.4
- RedHat / build_of_keycloak
- RedHat / keycloak24.0.2 – 24.0.2
References
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:21370
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:21371
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:22088
- VENDOR_ADVISORYhttps://access.redhat.com/errata/RHSA-2025:22089
- VENDOR_ADVISORYhttps://access.redhat.com/security/cve/CVE-2025-12150
- MISChttps://bugzilla.redhat.com/show_bug.cgi?id=2406192
- MISChttps://github.com/keycloak/keycloak/issues/43723
Updated 28m ago · 8 sources