Updated ghostscript packages has been released for CentOS 6 and 7:

CESA-2017:0013 Moderate CentOS 7 ghostscript Security Update
CESA-2017:0014 Moderate CentOS 6 ghostscript Security Update

CESA-2017:0013 Moderate CentOS 7 ghostscript Security Update

CentOS Errata and Security Advisory 2017:0013 Moderate

Upstream details at : https://rhn.redhat.com/errata/RHSA-2017-0013.html

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

x86_64:
f7fbc15229c5174e7b109647986be6b59507b5206272f0ee4ae7c09c8a45d39f ghostscript-9.07-20.el7_3.1.i686.rpm
3f19e6b7e56e128af4283d9fbf771cce4faeb8d68373f194f1603ccfcfb8c007 ghostscript-9.07-20.el7_3.1.x86_64.rpm
8e8ffffd7d90ead4c4fbb4c5981c208d31a17663e98d68dac8506a0f19a0cfc7 ghostscript-cups-9.07-20.el7_3.1.x86_64.rpm
4cfaec60746c560b410c0c142565e552901b31e1162e4fd931a95188745d3404 ghostscript-devel-9.07-20.el7_3.1.i686.rpm
481d904151f42d25f2ba85dff9edf3269a79b5ce5920ee23a2e53ab71ecce105 ghostscript-devel-9.07-20.el7_3.1.x86_64.rpm
be68ae75492a0a550ae9fc3a4cbd7de049a023009f4a5c7bafc935ca361cec07 ghostscript-doc-9.07-20.el7_3.1.noarch.rpm
d2806d687dc3e68f135f0583d9e5dfc44fb8c87aec3c2c1e91a641eade9b2801 ghostscript-gtk-9.07-20.el7_3.1.x86_64.rpm

Source:
3e4c0d68739b7bee6ecb4ea5fb145d5656cc275526e110e88ce9f48568691332 ghostscript-9.07-20.el7_3.1.src.rpm

CESA-2017:0014 Moderate CentOS 6 ghostscript Security Update

CentOS Errata and Security Advisory 2017:0014 Moderate

Upstream details at : https://rhn.redhat.com/errata/RHSA-2017-0014.html

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

i386:
b782201a3fc51ad215a773f3ce3a5b2f92716470f5182805f854372428d6c05f ghostscript-8.70-21.el6_8.1.i686.rpm
c450d8e76f4f7706f1f8d1bf9531d5791531614acd6562d3997816661d86d9a4 ghostscript-devel-8.70-21.el6_8.1.i686.rpm
7b1f7846d3aca69569081267b595309e0e2bcc6b51fef8acc741a27f8e3dcc22 ghostscript-doc-8.70-21.el6_8.1.i686.rpm
16be71364698b556c4c8c972badbf2ff7d906daca967387d9afae10f2a1ce07b ghostscript-gtk-8.70-21.el6_8.1.i686.rpm

x86_64:
b782201a3fc51ad215a773f3ce3a5b2f92716470f5182805f854372428d6c05f ghostscript-8.70-21.el6_8.1.i686.rpm
8fda7d94d616f78865b778c72611106da4ffa3869811a07be7b8f924147297d9 ghostscript-8.70-21.el6_8.1.x86_64.rpm
c450d8e76f4f7706f1f8d1bf9531d5791531614acd6562d3997816661d86d9a4 ghostscript-devel-8.70-21.el6_8.1.i686.rpm
561c3ccd850038e251d319f55fc700b4bed20dd4dcd43fa4765b2e358094749c ghostscript-devel-8.70-21.el6_8.1.x86_64.rpm
1acf2b6457380b6b387815c489cd0d7d8a14511a247a9dc490737a232e68a67b ghostscript-doc-8.70-21.el6_8.1.x86_64.rpm
4a55e46791fa5bb721088d138d96aa897bed83185c370276ba2abeff52d902f8 ghostscript-gtk-8.70-21.el6_8.1.x86_64.rpm

Source:
97e350a518a3f78e0cac61831ffde0e915ac60a8965a25e71e8d57b137485b44 ghostscript-8.70-21.el6_8.1.src.rpm