CVE-2026-4628
Keycloak: org.keycloak.authorization: keycloak: unauthorized resource modification due to improper access control
- State
- Published
- Severity
- 4.3 Medium
- Published
- Mar 23, 2026
- Updated
- Oct 22, 2026
- Reserved
- Mar 23, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | redhat |
Weaknesses
- CWE-284 Improper Access Control
Affected Products
| Product | Versions |
|---|---|
Red Hat build of Keycloak 26.4.12Red Hat | |
Red Hat Build of KeycloakRed Hat | |
Red Hat JBoss Enterprise Application Platform 8Red Hat | |
Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat | |
Red Hat Single Sign-On 7Red Hat |
References
- RHSA-2026:19596vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-4628vdb-entry
- RHBZ#2450240issue-tracking
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