CVE-2016-4554
mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct cache-poisoning attacks via a crafted HTTP Host header, aka a "header smuggling" issue.
Date published : 2016-05-10
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html