Low [CVE-2025-12150] webauthn attestation statement verification bypass
This low-severity Red Hat Linux advisory covers CVE-2025-12150 affecting Red Hat build of Keycloak 26.2, Red Hat build of Keycloak 26.4.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published
Summary
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 named by the advisory: Red Hat build of Keycloak 26.2; Red Hat build of Keycloak 26.4.
Is CVE-2025-12150 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2025-12150 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2025-12150?
Upgrade to a fixed release named by Red Hat:
- 26.4.4
Confirm against the vendor advisory before you patch.
- keycloak before 26.4.4
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
- 26.4.4
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
Mitigation
Upgrade to a fixed release: 26.4.4. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
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