CVE-2025-12150

ℹ️ low

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.

CVSS Score

3.1

Low

EPSS Score

0.0

Exploit Probability

Published Date

2026-02-27

First Seen: 2026-02-28

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 2.1% of all 318,071 vulnerabilities in our database.

#311,381

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Feb 27, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

🏆 Discovered By

Red Hat would like to thank Stefan Kunz (cnlab) for reporting this issue.

SSVC data provided by CISA

Last Modified 2026-03-05

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-347

📦 Affected Products 3

Vendor	Product	Status	Affected Versions
redhat	keycloak	Affected	v24.0.2
redhat	build_of_keycloak	Affected	< 26.4.4
redhat	build_of_keycloak	Affected	v-

🔗 References 7

https://access.redhat.com/errata/RHSA-2025:21370

Vendor Advisory

https://access.redhat.com/errata/RHSA-2025:21371

Vendor Advisory

https://access.redhat.com/errata/RHSA-2025:22088

Vendor Advisory

https://access.redhat.com/errata/RHSA-2025:22089

Vendor Advisory

https://access.redhat.com/security/cve/CVE-2025-12150

Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=2406192

Issue Tracking

https://github.com/keycloak/keycloak/issues/43723

Issue Tracking

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-37977	ℹ️ low	3.7	0.0	A flaw was found in Keycloak. A remote attacker can exploit a Cross-Origin Resource Sharing (CORS) header injection vuln...	2026-04-06
CVE-2026-3121	🔶 medium	6.5	0.0	A flaw was found in Keycloak. An administrator with `manage-clients` permission can exploit a misconfiguration where thi...	2026-03-26
CVE-2026-3190	🔶 medium	4.3	0.0	A flaw was found in Keycloak. The User-Managed Access (UMA) 2.0 Protection API endpoint for permission tickets fails to ...	2026-03-26
CVE-2026-3047	⚠️ high	8.8	0.3	A flaw was found in org.keycloak.broker.saml. When a disabled Security Assertion Markup Language (SAML) client is config...	2026-03-05
CVE-2026-3009	⚠️ high	8.1	0.0	A security flaw in the IdentityBrokerService.performLogin endpoint of Keycloak allows authentication to proceed using an...	2026-03-05
CVE-2026-0871	🔶 medium	4.9	0.0	A flaw was found in Keycloak. An administrator with `manage-users` permission can bypass the "Only administrators can vi...	2026-02-27

These CVEs affect the same products