Live › vulnerability › CVE-2026-9799
Keycloak's authorization code lets an authenticated user with a UMA permission ticket for one resource reach all resources of that type on the same resource server. The result is unauthorized reading or modification of resources the user was never granted.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-29 16:39 UTC, 0h before NVD. All times on this page are UTC.
Only Keycloak deployments that use UMA authorization services with a resource server in PERMISSIVE policy enforcement mode, where typed resources have ownerManagedAccess enabled and no explicit policy covers that resource type. Deployments on enforcing mode, or without UMA-managed typed resources, are not exposed by this description.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| org.keycloak:keycloak-services | maven | < 26.6.4 | 26.6.4 |
| redhat build of keycloak | vendor | >= 26.4, < 26.4.13 | 26.4.13 |
| redhat build of keycloak | vendor | >= 26.6, < 26.6.4 | 26.6.4 |
kc.sh --version or the image tag, and compare it to .26.6.4PERMISSIVE.ownerManagedAccess enabled with no explicit policy protecting that resource type.org.keycloak:keycloak-services moves to 26.6.4 (fixed version from the advisory product range; affected below 26.6.4).Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
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.
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