Duplicate Advisory: Keycloak allows unauthorized access to resources via uma permission ticket bypass
Severity: medium · CVSS 4.6 · Published 2026-06-25
### Duplicate Advisory
This advisory has been withdrawn because it is a duplicate of GHSA-w3p3-7cjg-vgfw. This link is maintained to preserve external references.
### Original Description
A flaw was found in org.keycloak.authorization. An authenticated user with a granted User-Managed Access (UMA) permission ticket for one resource can exploit this by using a specific permission request prefix to bypass per-resource access control. This allows the user to gain unauthorized access to all resources of that type within the same resource server, even if they do not have a ticket for those specific resources. This vulnerability requires the resource server to be configured in PERMISSIVE policy enforcement mode and affects typed resources with ownerManagedAccess enabled, where no explicit policy protects the resource type. The primary consequence is unauthorized information disclosure or modification of resources.
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
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