CVE-2025-12150

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

LOW
3.1
CVSS Score
Published: February 27, 2026 at 08:10 AM UTC
Updated: August 10, 2026 at 03:16 AM UTC
2 products affected across 2 vendorsBuild of KeycloakKeycloak

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Severity
LOW3.1
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 26.4.424.0.2
Affected range stops below 26.4.4, so it looks safe — our inference, not a vendor statement
v < 26.4.4
Vendor states this is fixed in 26.2-12 (unaffected)
Vendor states this is fixed in 26.2.11 (unaffected)
Vendor states this is fixed in 26.2.11-1 (unaffected)
Vendor states this is fixed in 26.4-3 (unaffected)
Vendor states this is fixed in 26.4.4 (unaffected)
Vendor states this is fixed in 26.4.4-1 (unaffected)

References (7)

Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2025:21370
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2025:21371
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2025:22088
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2025:22089
VDB Entryx_refsource_REDHATVendor Advisory
Source: cverecord
https://access.redhat.com/security/cve/CVE-2025-12150
Issue Trackingx_refsource_REDHAT
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2406192

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.1LOWredhat
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-347

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