---
id: CVE-2026-94217
title: A flaw was found in the User-Managed Access (UMA) implementation of Keycloak
summary: >-
  A flaw was found in the User-Managed Access (UMA) implementation of Keycloak.
  The issue occurs in the authorization token endpoint when processing
  permission tickets. If two different users own resources with the same name,
  the system in…
severity: low
cvss: 3.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
vendor: Red Hat
product: keycloak/rhbk-openshift-rhel9
affected:
  - keycloak/rhbk-openshift-rhel9 (all versions)
  - keycloak-services (all versions)
  - rhbk/keycloak-rhel9 (all versions)
  - keycloak-services
published: '2026-09-21'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T14:18:20.040'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94217'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-94217'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2537313'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94217.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-94217'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94217'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00238
epssPercentile: 0.13227
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-24T13:20:18.157601Z'
ingestedAt: '2026-09-21T07:33:19.003Z'
---

## Overview

A flaw was found in the User-Managed Access (UMA) implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one user requests an authorization token. This allows an attacker to gain access scopes on a victim's resource that were never intended to be shared.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Build of Keycloak · no fix planned: Red Hat Build of Keycloak · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94217.json)