CVE-2021-25642: Apache Hadoop

High severity, CVSS 8.8. EPSS: 2.3% chance of exploitation in the next 30 days.

ZKConfigurationStore which is optionally used by CapacityScheduler of Apache Hadoop YARN deserializes data obtained from ZooKeeper without validation. An attacker having access to ZooKeeper can run arbitrary commands as YARN user by exploiting this. Users should upgrade to Apache Hadoop 2.10.2, 3.2.4, 3.3.4 or later (containing YARN-11126) if ZKConfigurationStore is used.

Affected products

• Apache Hadoop: from 2.9.0, before 2.10.2 (fixed in 2.10.2); from 3.0.0, before 3.2.4 (fixed in 3.2.4); from 3.3.0, before 3.3.4 (fixed in 3.3.4)

Published 2022-08-25. Last modified 2026-06-17.