CVE-2026-9801

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.

Score
CVSS 3.1 4.9 Medium
Status
Modified - secalert@redhat.com
Published
2026-05-28
Last modified
2026-10-26
Weaknesses
CWE-1284

Affected products

References

 
 
© AVABIS GmbH privacypolicy about