---
id: CVE-2026-4628
aliases:
  - GHSA-4pgc-gfrr-wcmg
title: >-
  Keycloak has Improper Access Control that allows attackers with valid
  credentials to bypass the allowRemoteResourceManagement=false
summary: >-
  Keycloak has Improper Access Control that allows attackers with valid
  credentials to bypass the allowRemoteResourceManagement=false
severity: medium
cvss: 4.3
cwe:
  - CWE-284
vendor: keycloak
product: 'org.keycloak:keycloak-services'
ecosystem: maven
affected:
  - 'org.keycloak:keycloak-services <= 26.6.0'
published: '2026-03-23'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T21:32:00Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-4pgc-gfrr-wcmg'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-4628'
  - url: 'https://access.redhat.com/security/cve/CVE-2026-4628'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2450240'
  - url: 'https://access.redhat.com/errata/RHSA-2026:19596'
  - url: 'https://github.com/advisories/GHSA-4pgc-gfrr-wcmg'
tags:
  - ghsa
  - maven
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-03-25T14:02:51.761138Z'
epss: 0.00275
epssPercentile: 0.18842
ingestedAt: '2026-10-22T22:00:50.248Z'
---

## Overview

A flaw was found in Keycloak. An improper Access Control vulnerability in Keycloak’s User-Managed Access (UMA) resource_set endpoint allows attackers with valid credentials to bypass the allowRemoteResourceManagement=false restriction. This occurs due to incomplete enforcement of access control checks on PUT operations to the resource_set endpoint. This issue enables unauthorized modification of protected resources, impacting data integrity.

## Affected packages

- `org.keycloak:keycloak-services <= 26.6.0`

## Remediation

Refer to the advisory for the patched release.