client_side_request.cc in Squid 3.x before 3.5.18 and 4.x before 4.0.10 allows remote servers to cause a denial of service (crash) via crafted Edge Side Includes (ESI) responses.
https://security.gentoo.org/glsa/201607-01
https://access.redhat.com/errata/RHSA-2016:1140
https://access.redhat.com/errata/RHSA-2016:1139
http://www.ubuntu.com/usn/USN-2995-1
http://www.squid-cache.org/Versions/v3/3.5/changesets/SQUID-2016_9.patch
http://www.squid-cache.org/Versions/v3/3.4/changesets/SQUID-2016_9.patch
http://www.squid-cache.org/Advisories/SQUID-2016_9.txt
http://www.securitytracker.com/id/1035770
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.openwall.com/lists/oss-security/2016/05/06/5
http://www.openwall.com/lists/oss-security/2016/05/06/3
http://www.debian.org/security/2016/dsa-3625
http://lists.opensuse.org/opensuse-updates/2016-08/msg00069.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00010.html