CVE-2026-37978

MEDIUM

Keycloak: org.keycloak.services: keycloak: information disclosure via evaluate-scopes admin api

Title source: cna
STIX 2.1

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.

References (4)

Core 4
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-37978
Issue Tracking, X_Refsource_Redhat issue-tracking x_refsource_redhat
RHBZ#2455327
https://bugzilla.redhat.com/show_bug.cgi?id=2455327
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:19596
https://access.redhat.com/errata/RHSA-2026:19596
Vendor Advisory vendor-advisory x_refsource_redhat
RHSA-2026:19597
https://access.redhat.com/errata/RHSA-2026:19597

Scores

CVSS v3 4.9
EPSS 0.0001
EPSS Percentile 1.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-639
Status published
Products (4)
Red Hat/Red Hat Build of Keycloak
Red Hat/Red Hat build of Keycloak 26.4 26.4-17
Red Hat/Red Hat build of Keycloak 26.4 26.4.12-1
Red Hat/Red Hat build of Keycloak 26.4.12
Published May 19, 2026
Tracked Since May 19, 2026