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.
Weakness
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Red Hat build of Keycloak 26.2 | RedHat | rhbk/keycloak-operator-bundle:26.2.11-1 | * |
| Red Hat build of Keycloak 26.2 | RedHat | rhbk/keycloak-rhel9:26.2-12 | * |
| Red Hat build of Keycloak 26.2 | RedHat | rhbk/keycloak-rhel9-operator:26.2-12 | * |
| Red Hat build of Keycloak 26.2.11 | RedHat | * | |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-operator-bundle:26.4.4-1 | * |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-rhel9:26.4-3 | * |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-rhel9-operator:26.4-3 | * |
| Red Hat build of Keycloak 26.4.4 | RedHat | org.keycloak/keycloak-services | * |
Related Attack Patterns
References
- https://access.redhat.com/errata/RHSA-2025:21370
- https://access.redhat.com/errata/RHSA-2025:21371
- https://access.redhat.com/errata/RHSA-2025:22088
- https://access.redhat.com/errata/RHSA-2025:22089
- https://access.redhat.com/security/cve/CVE-2025-12150
- https://bugzilla.redhat.com/show_bug.cgi?id=2406192
- https://github.com/keycloak/keycloak/issues/43723