Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate 2026-05-19T10:19:46 keycloak: org.keycloak.authorization: Keycloak: Information disclosure via broken access control in user lookup endpoint 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N CWE-1220

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.

Moderate: This vulnerability in Red Hat Build of Keycloak (RHBK) allows an authenticated user to bypass access controls in the Account Resources user lookup endpoint. By sending crafted requests, an attacker can enumerate and harvest personal identifiable information (PII) for all users within a realm, leading to broad profile-level information disclosure. Red Hat would like to thank XavLimSG for reporting this issue. 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. Red Hat build of Keycloak 26.4 2026-05-20T00:00:00Z RHSA-2026:19597 rhbk/keycloak-operator-bundle:26.4.12-1 Red Hat build of Keycloak 26.4 2026-05-20T00:00:00Z RHSA-2026:19597 rhbk/keycloak-rhel9:26.4-17 Red Hat build of Keycloak 26.4 2026-05-20T00:00:00Z RHSA-2026:19597 rhbk/keycloak-rhel9-operator:26.4-17 Red Hat build of Keycloak 26.4.12 2026-05-20T00:00:00Z RHSA-2026:19596 rhbk/keycloak-rhel9 https://www.cve.org/CVERecord?id=CVE-2026-37981 https://nvd.nist.gov/vuln/detail/CVE-2026-37981