A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credentials parameters, such as public key algorithms, match the realms configured WebAuthn policies. This could lead to the creation of credentials that do not adhere to administrative security requirements, potentially weakening the overall security posture of the system by allowing non-compliant authentication methods.
Weakness
A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Build_of_keycloak | Redhat | - (including) | - (including) |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-operator-bundle:26.4.13-1 | * |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-rhel9:26.4-19 | * |
| Red Hat build of Keycloak 26.4 | RedHat | rhbk/keycloak-rhel9-operator:26.4-19 | * |
| Red Hat build of Keycloak 26.4.13 | RedHat | rhbk/keycloak-rhel9-operator | * |
| Red Hat build of Keycloak 26.6 | RedHat | rhbk/keycloak-operator-bundle:26.6.3-3 | * |
| Red Hat build of Keycloak 26.6 | RedHat | rhbk/keycloak-rhel9:26.6-6 | * |
| Red Hat build of Keycloak 26.6 | RedHat | rhbk/keycloak-rhel9-operator:26.6-6 | * |
| Red Hat build of Keycloak 26.6.3 | RedHat | rhbk/keycloak-rhel9-operator | * |