The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2016-0747.json"