client_side.cc in Squid before 3.5.18 and 4.x before 4.0.10 does not properly ignore the Host header when absolute-URI is provided, which allows remote attackers to conduct cache-poisoning attacks via an HTTP request.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2016-4553.json"