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.
Severity (CVSS)
| Base score | 4.6 |
|---|---|
| Severity | Medium |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N |
| Provided by | CNA |
Weaknesses
- CWE-639 — Authorization Bypass Through User-Controlled Key
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6.4-2 to <* |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-8 to <* |
| Red Hat | Red Hat build of Keycloak 26.6 | 26.6-8 to <* |
| Red Hat | Red Hat build of Keycloak 26.6.4 | — |
References
- https://access.redhat.com/errata/RHSA-2026:30083 (vendor-advisory x_refsource_REDHAT)
- https://access.redhat.com/errata/RHSA-2026:30084 (vendor-advisory x_refsource_REDHAT)
- https://access.redhat.com/security/cve/CVE-2026-9799 (vdb-entry x_refsource_REDHAT)
- https://bugzilla.redhat.com/show_bug.cgi?id=2482471 (issue-tracking x_refsource_REDHAT)
Generated from the official CVE List on 26 Jun 2026 07:05 UTC.