PT-2026-27107 · Red Hat · Red Hat Build Of Keycloak

Published 2026-03-23 · Updated 2026-03-23 · CVE-2026-4633

NVD

CVSS v3.1

3.7

Low

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

A flaw was found in Keycloak. A remote attacker can exploit differential error messages during the identity-first login flow when Organizations are enabled. This vulnerability allows an attacker to determine the existence of users, leading to information disclosure through user enumeration.

Fix

Generation of Error Message Containing Sensitive Information

Weakness Enumeration

CWE-209

Related Identifiers

CVE-2026-4633

Affected Products

Red Hat Build Of Keycloak

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-4633 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2450247 · Note
• https://access.redhat.com/security/cve/CVE-2026-4633 · Note