CVE-2018-11765: Apache Hadoop

High severity, CVSS 7.5. EPSS: 5.2% chance of exploitation in the next 30 days.

In Apache Hadoop versions 3.0.0-alpha2 to 3.0.0, 2.9.0 to 2.9.2, 2.8.0 to 2.8.5, any users can access some servlets without authentication when Kerberos authentication is enabled and SPNEGO through HTTP is not enabled.

Affected products

• Apache Hadoop: from 2.8.0, up to and including 2.8.5; from 2.9.0, up to and including 2.9.2; version 3.0.0 only

Published 2020-09-30. Last modified 2026-06-17.