CVE-2026-16105

Medium

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.

SeverityMedium

CVSS4.9

Exploit probability—

Product

Redhat Build Of Keycloak

PublishedJul 31, 2026

First seenJul 31, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Vendor advisories

Affected products

Product	Affected versions	Fixed in
redhat build_of_keycloak	No range specified	—

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