PT-2026-44194 · Red Hat · Red Hat Build Of Keycloak

Published 2026-05-28 · Updated 2026-05-28 · CVE-2026-9801

NVD

CVSS v3.1

4.9

Medium

Base vector

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

A flaw was found in Keycloak. A remote attacker with high privileges, such as a realm administrator configuring a malicious Lightweight Directory Access Protocol (LDAP) server or an attacker compromising an upstream LDAP server, could exploit this vulnerability. By sending a malformed LDAP password policy response during a password authentication request, the attacker can trigger an OutOfMemoryError. This causes the Keycloak Java Virtual Machine (JVM) to terminate, leading to a denial of service (DoS) for all realms on the affected node.

Fix

Weakness Enumeration

CWE-1284

Related Identifiers

CVE-2026-9801

Affected Products

Red Hat Build Of Keycloak

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-9801 · Security Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2482473 · Note
• https://access.redhat.com/security/cve/CVE-2026-9801 · Note