CVE-2025-14778
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
09/02/2026
Last modified:
10/02/2026
Description
A flaw was found in Keycloak. A significant Broken Access Control vulnerability exists in the UserManagedPermissionService (UMA Protection API). When updating or deleting a UMA policy associated with multiple resources, the authorization check only verifies the caller's ownership against the first resource in the policy's list. This allows a user (Owner A) who owns one resource (RA) to update a shared policy and modify authorization rules for other resources (e.g., RB) in that same policy, even if those other resources are owned by a different user (Owner B). This constitutes a horizontal privilege escalation.
Impact
Base Score 3.x
5.40
Severity 3.x
MEDIUM