CVE-2026-14209 — MEDIUM (4.3)

Vulnerability Description

A vulnerability was discovered in Keycloak's Admin UI extension that allows certain administrative users to bypass security restrictions. When Fine-Grained Admin Permissions (FGAPv2) are enabled, an administrator who should only be able to search for users (but not view their full details) can use a specific "brute-force-user" endpoint to access a user's full profile. This includes sensitive information and security metadata. The issue occurs because the system fails to check if the administrator has the required "view" permission for that specific user when using this particular search path.

CVSS Score

4.3

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Redhat	Build Of Keycloak	-
Redhat	Jboss Enterprise Application Platform Expansion Pack	-

Related Weaknesses (CWE)

CWE-639

References

FAQ

What is CVE-2026-14209?

CVE-2026-14209 is a vulnerability with a CVSS score of 4.3 (MEDIUM). A vulnerability was discovered in Keycloak's Admin UI extension that allows certain administrative users to bypass security restrictions. When Fine-Grained Admin Permissions (FGAPv2) are enabled, an a...

How severe is CVE-2026-14209?

CVE-2026-14209 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-14209?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Build Of Keycloak, Redhat Jboss Enterprise Application Platform Expansion Pack.