In Apache Hadoop 2.6.x before 2.6.5 and 2.7.x before 2.7.3, a remote user who can authenticate with the HDFS NameNode can possibly run arbitrary commands with the same privileges as the HDFS service.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2016-5393.json"