Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2.13-1 before * |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2-15 before * |
| Red Hat / Red Hat build of Keycloak 26.2 | unaffected 26.2-15 before * |
| Red Hat / Red Hat build of Keycloak 26.2.13 | unaffected |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4.9-1 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-11 before * |
| Red Hat / Red Hat build of Keycloak 26.4 | unaffected 26.4-10 before * |
| Red Hat / Red Hat build of Keycloak 26.4.9 | unaffected |
CWE
CWE-266
References
- https://access.redhat.com/errata/RHSA-2026:2363
- https://access.redhat.com/errata/RHSA-2026:2364
- https://access.redhat.com/errata/RHSA-2026:2365
- https://access.redhat.com/errata/RHSA-2026:2366
- https://access.redhat.com/security/cve/CVE-2025-14778
- https://bugzilla.redhat.com/show_bug.cgi?id=2422600
ADP enrichment
No English description supplied.
No references supplied.