A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm.

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Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

To mitigate this issue, disable the Fine-Grained Admin Permissions (FGAPv2) feature in Keycloak if it is not strictly required. This can typically be done by setting `adminPermissionsEnabled` to `false` in the realm configuration. Disabling FGAPv2 will prevent the exploitation of this flaw by removing the vulnerable functionality. However, this may impact administrative delegation capabilities within Keycloak. A restart or reload of the Keycloak service may be required for the changes to take effect.

History

Thu, 28 May 2026 07:30:00 +0000

Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
Vendors & Products Redhat build Of Keycloak

Thu, 28 May 2026 04:45:00 +0000

Type Values Removed Values Added
Description A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm.
Title Keycloak: keycloak: privilege escalation via improper scope mapping enforcement
First Time appeared Redhat
Redhat build Keycloak
Weaknesses CWE-266
CPEs cpe:/a:redhat:build_keycloak:
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-05-28T03:49:10.874Z

Reserved: 2026-05-28T03:16:18.721Z

Link: CVE-2026-9795

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-28T05:16:41.003

Modified: 2026-05-28T05:16:41.003

Link: CVE-2026-9795

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-28T07:15:11Z

Weaknesses