PT-2026-41871 · Red Hat · Red Hat Build Of Keycloak

Published 2026-05-19 · Updated 2026-05-19 · CVE-2026-37981

Mitre

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

A flaw was found in Keycloak. A broken access control vulnerability in the Account Resources user lookup endpoint allows a remote authenticated user, who owns at least one User-Managed Access (UMA) resource, to enumerate and harvest personally identifiable information (PII) for all realm users. By sending crafted requests with arbitrary usernames or email values, the endpoint returns full profile objects for unrelated users. This leads to broad profile-level information disclosure.

Fix

Weakness Enumeration

CWE-1220

Related Identifiers

CVE-2026-37981

Affected Products

Red Hat Build Of Keycloak

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-37981 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-37981 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2455326 · Note