Description
A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.
Published: 2026-05-19
Score: 4.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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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
Source ID Title
Github GHSA Github GHSA GHSA-rrv7-3mqf-hxfr Keycloak: Information Disclosure via evaluate-scopes Admin API
History

Wed, 03 Jun 2026 20:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*

Wed, 20 May 2026 16:45:00 +0000

Type Values Removed Values Added
References

Wed, 20 May 2026 12:15:00 +0000

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

Wed, 20 May 2026 11:45:00 +0000

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

Tue, 19 May 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 19 May 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 19 May 2026 11:30:00 +0000

Type Values Removed Values Added
Description A flaw was found in Keycloak. A low-privilege administrator with the 'view-clients' role can exploit this by invoking the 'evaluate-scopes' Admin API endpoints with an arbitrary user ID (userId) parameter. This vulnerability allows for cross-role personally identifiable information (PII) leakage, enabling unauthorized visibility into user identities and authorizations across the realm. Exploitation is possible remotely via network access to the Admin API.
Title Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api
First Time appeared Redhat
Redhat build Keycloak
Weaknesses CWE-639
CPEs cpe:/a:redhat:build_keycloak:
Vendors & Products Redhat
Redhat build Keycloak
References
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'}


Subscriptions

Redhat Build Keycloak Build Of Keycloak
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-05-20T16:08:53.433Z

Reserved: 2026-04-06T07:48:39.721Z

Link: CVE-2026-37978

cve-icon Vulnrichment

Updated: 2026-05-19T12:23:32.689Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-19T12:16:17.540

Modified: 2026-06-17T10:41:39.480

Link: CVE-2026-37978

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-05-19T10:43:47Z

Links: CVE-2026-37978 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-20T10:39:23Z

Weaknesses