What’s Vulnerable › Vulnerabilities

CVE-2025-12150: Org.keycloak/keycloak-services: webauthn attestation statement verification bypass

• Severity: low (CVSS 3.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-27 · updated 2026-08-10
• Weakness: CWE-347

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

• Red Hat build of Keycloak 26.4: before 26.4.4 — fixed in 26.4.4
• Keycloak: 24.0.2

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.4.4. Check the vendor advisory for mitigations.

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

Get alerted when CVE-2025-12150 or the next vulnerability affects your stack