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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Keycloak | keycloak | < 26.4.4 | 26.4.4 |
| Red Hat | Red Hat build of Keycloak 26.2 | — | — |
| Red Hat | Red Hat build of Keycloak 26.2.11 | — | — |
| Red Hat | Red Hat build of Keycloak 26.4 | — | — |
| Red Hat | Red Hat build of Keycloak 26.4.4 | — | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.keycloak:keycloak-services | < 26.4.4 | 26.4.4 | GHSA-7g5x-9c4v-4w5r |
Advisories 1
- WID-SEC-2025-2606 Keycloak: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 26, 2026
References
- RHSA-2025:21370 vendor-advisory
- RHSA-2025:21371 vendor-advisory
- RHSA-2025:22088 vendor-advisory
- RHSA-2025:22089 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2025-12150 vdb-entry
- RHBZ#2406192 issue-tracking
- https://github.com/keycloak/keycloak/issues/43723