CentOS Errata and Bugfix Advisory 2016:1412 

Upstream details at : https://rhn.redhat.com/errata/RHBA-2016-1412.html

The following updated files have been uploaded and are currently 
syncing to the mirrors: ( sha256sum Filename ) 

i386:
fff0dd32f665f2b79fa4ebeeb6ae7a11b301a6c834e0fbb36df4e9c1df1d1445  squid-3.1.23-16.el6_8.5.i686.rpm

x86_64:
5116eea8aeb7ae1ee1c6b1981d0f945623d9fa4360fc03683d408715beb49ff8  squid-3.1.23-16.el6_8.5.x86_64.rpm

Source:
7574e5a7ca27204f424e247bc8b308369c0b811bd9b23639553eaf7c25317b61  squid-3.1.23-16.el6_8.5.src.rpm