CVE-2026-16105 — MEDIUM (4.9)

Vulnerability Description

A flaw was found in the RoleContainerResource component of Keycloak. The issue occurs because certain name-based endpoints in the admin REST API do not properly enforce authorization checks when managing composite roles. This allows a delegated administrator with manage-realm permissions to remove essential child roles from built-in admin roles, potentially disrupting administrative functions within a realm.

CVSS Score

4.9

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Redhat	Build Of Keycloak	-

Related Weaknesses (CWE)

CWE-862

References

https://access.redhat.com/security/cve/CVE-2026-16105Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2501738Issue TrackingVendor Advisory

FAQ

What is CVE-2026-16105?

CVE-2026-16105 is a vulnerability with a CVSS score of 4.9 (MEDIUM). A flaw was found in the RoleContainerResource component of Keycloak. The issue occurs because certain name-based endpoints in the admin REST API do not properly enforce authorization checks when manag...

How severe is CVE-2026-16105?

CVE-2026-16105 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-16105?

Check the references section above for vendor advisories and patch information. Affected products include: Redhat Build Of Keycloak.