CVE-2025-12150

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

State: Published
Severity: 3.1 Low
Published: Feb 27, 2026
Updated: Aug 10, 2026
Reserved: Oct 24, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	3.1 Low	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N	redhat

Weaknesses

CWE-347 Improper Verification of Cryptographic Signature

Affected Products

Product	Versions
keycloakKeycloak	before 26.4.4Affected
Red Hat build of Keycloak 26.2Red Hat	26.2.11-1 and laterNot affected
Red Hat build of Keycloak 26.2Red Hat	26.2-12 and laterNot affected
Red Hat build of Keycloak 26.2Red Hat	26.2-12 and laterNot affected
Red Hat build of Keycloak 26.2.11Red Hat
Red Hat build of Keycloak 26.4Red Hat	26.4.4-1 and laterNot affected
Red Hat build of Keycloak 26.4Red Hat	26.4-3 and laterNot affected
Red Hat build of Keycloak 26.4Red Hat	26.4-3 and laterNot affected
Red Hat build of Keycloak 26.4.4Red Hat

References

RHSA-2025:21370vendor-advisory
RHSA-2025:21371vendor-advisory
RHSA-2025:22088vendor-advisory
RHSA-2025:22089vendor-advisory
https://access.redhat.com/security/cve/CVE-2025-12150vdb-entry
RHBZ#2406192issue-tracking
https://github.com/keycloak/keycloak/issues/43723

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