CVE-2026-9799

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.

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Produits concernés

• Red Hat build of Keycloak 26.4
• Red Hat build of Keycloak 26.4.13
• Red Hat build of Keycloak 26.6
• Red Hat build of Keycloak 26.6.4
• Redhat build of keycloak

Scores CVSS

Faiblesses (CWE)

• CWE-639

Références

• https://access.redhat.com/errata/RHSA-2026:30049 Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:30050 Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:30083 Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:30084 Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-9799 Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2482471 Vendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories