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.

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Fixes

Solution

No solution given by the vendor.


Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

History

Fri, 03 Apr 2026 01:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Thu, 02 Apr 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
CPEs cpe:/a:redhat:build_keycloak:26.2::el9
Vendors & Products Redhat build Of Keycloak
References

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'}


Projects

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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: 2026-04-02T17:16:29.297

Link: CVE-2026-4282

cve-icon Redhat

Severity : Important

Publid Date: 2026-04-02T12:30:00Z

Links: CVE-2026-4282 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-02T20:21:23Z

Weaknesses