A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.
History

Thu, 02 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 02 Apr 2026 14:15:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:build_keycloak: cpe:/a:redhat:build_keycloak:26.4::el9
References

Thu, 02 Apr 2026 13:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.
Title Keycloak: keycloak: privilege escalation via forged authorization codes due to singleuseobjectprovider isolation flaw
First Time appeared Redhat
Redhat build Keycloak
Weaknesses CWE-653
CPEs cpe:/a:redhat:build_keycloak:
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-04-02T16:34:56.651Z

Reserved: 2026-03-16T15:53:24.993Z

Link: CVE-2026-4282

cve-icon Vulnrichment

Updated: 2026-04-02T14:23:43.727Z

cve-icon NVD

Status : Received

Published: 2026-04-02T13:16:26.680

Modified: 2026-04-02T14:16:33.227

Link: CVE-2026-4282

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.