CVE-2026-17526

Keycloak-services: keycloak-services: privilege escalation via impersonation role allows takeover of realm administrator accounts

Published Sep 16, 2026 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Description
Keycloak is an open-source identity and access management solution. A vulnerability was discovered where a user with the impersonation role can impersonate a realm administrator. This allows the attacker to gain full administrative control over the realm, including the ability to manage users, clients, and roles.

Remediation

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.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Redhat build Of Keycloak
Redhat data Grid 8
Redhat jboss Enterprise Application Platform Expansion Pack
Vendors & Products Redhat build Of Keycloak
Redhat data Grid 8
Redhat jboss Enterprise Application Platform Expansion Pack
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Redhat jboss Data Grid
Redhat jbosseapxp
Redhat red Hat Single Sign On
CPEs cpe:/a:redhat:jboss_data_grid:8
cpe:/a:redhat:jbosseapxp
cpe:/a:redhat:red_hat_single_sign_on:7
Vendors & Products Redhat jboss Data Grid
Redhat jbosseapxp
Redhat red Hat Single Sign On
Type Values Removed Values Added
Description Keycloak is an open-source identity and access management solution. A vulnerability was discovered where a user with the impersonation role can impersonate a realm administrator. This allows the attacker to gain full administrative control over the realm, including the ability to manage users, clients, and roles.
Title Keycloak-services: keycloak-services: privilege escalation via impersonation role allows takeover of realm administrator accounts
First Time appeared Redhat
Redhat build Keycloak
Weaknesses CWE-862
CPEs cpe:/a:redhat:build_keycloak:26.4::el9
cpe:/a:redhat:build_keycloak:26.6::el9
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Sep 16, 2026, 6:09 PM
Reserved
Jul 27, 2026, 8:39 AM
Status
Awaiting Analysis
Published
Sep 16, 2026, 4:17 PM
Modified
Sep 16, 2026, 7:42 PM
Severity
Important
Public date
Sep 16, 2026, 12:58 PM