4.6

CVE-2026-9799

Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass

Unauthorized access to resources via uma permission ticket bypass

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.
Mögliche Gegenmaßnahme
Keycloak Server: Install latest version
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Redhat ≫ Build Of Keycloak Version >= 26.4 < 26.4.13
Redhat ≫ Build Of Keycloak Version >= 26.6 < 26.6.4
VulnDex Vulnerability Enrichment
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Weitere Schwachstelleninformationen
SystemKeycloak
≫
Produkt Keycloak Server
Version < 26.6.4
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.17% 0.062
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
secalert@redhat.com 4.6 2.1 2.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CWE-639 Authorization Bypass Through User-Controlled Key

The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

https://access.redhat.com/security/cve/CVE-2026-9799
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2482471
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/errata/RHSA-2026:30049
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:30050
Vendor Advisory
https://github.com/keycloak/keycloak/security/advisories/GHSA-w3p3-7cjg-vgfw
Third Party Advisory