CVE-2016-4553
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.
Date published : 2016-05-10
http://bugs.squid-cache.org/show_bug.cgi?id=4501
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html