Updated wireshark packages are available for both CentOS 5 and 6:

CESA-2014:0341 Moderate CentOS 5 wireshark Update
CESA-2014:0342 Moderate CentOS 6 wireshark Update

CESA-2014:0341 Moderate CentOS 5 wireshark Update

CentOS Errata and Security Advisory 2014:0341 Moderate

Upstream details at : https://rhn.redhat.com/errata/RHSA-2014-0341.html

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

i386:
08c8c02b8cedb60b86ec5c10c5caadeb4549493751a112ab44367ae35825a201 wireshark-1.0.15-6.el5_10.i386.rpm
0f9a6201343210ba03cf0d218d6d1781aa3f8766c1ccdb2ad2b40d1891676f63 wireshark-gnome-1.0.15-6.el5_10.i386.rpm

x86_64:
0f76ec04395bd97354cc4388ead650651d81a1ef1b2261d193f87762428cf46a wireshark-1.0.15-6.el5_10.x86_64.rpm
9c19cb783ff6c54a96da465f69c7d2ddc0391565470e1709b3071e9c0d31a07a wireshark-gnome-1.0.15-6.el5_10.x86_64.rpm

Source:
0cfa8fc9cb3a5ccf88ff1fec32de647b06a42a2e6eb8e9b003f68dff867ef812 wireshark-1.0.15-6.el5_10.src.rpm

CESA-2014:0342 Moderate CentOS 6 wireshark Update

CentOS Errata and Security Advisory 2014:0342 Moderate

Upstream details at : https://rhn.redhat.com/errata/RHSA-2014-0342.html

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

i386:
e86f9c91381562e4ed24f3be923675eef44e0c6023a0cdca443c59c1c09687df wireshark-1.8.10-7.el6_5.i686.rpm
01a5149ec6028dc2be17b1118d44c0fa9054a6bee017bd55e5c7a521fafe6cd8 wireshark-devel-1.8.10-7.el6_5.i686.rpm
c9fdd1f944111358f6a038a8e151b726bd626ef20dc40f1ef00b9500d3423402 wireshark-gnome-1.8.10-7.el6_5.i686.rpm

x86_64:
e86f9c91381562e4ed24f3be923675eef44e0c6023a0cdca443c59c1c09687df wireshark-1.8.10-7.el6_5.i686.rpm
4d85f7abcd56ab9c99156037445c5288505ba930c9d5b220a2bf3e9a7b7b5508 wireshark-1.8.10-7.el6_5.x86_64.rpm
01a5149ec6028dc2be17b1118d44c0fa9054a6bee017bd55e5c7a521fafe6cd8 wireshark-devel-1.8.10-7.el6_5.i686.rpm
798968dd1fa8b839acaa65fc32595ba22993dc217139afde6004e0f3d29ca2d6 wireshark-devel-1.8.10-7.el6_5.x86_64.rpm
f1965eabc7c53b3c085555db4ac3ac6a31f5ee2dfc261ef644a6a0a767ede4b3 wireshark-gnome-1.8.10-7.el6_5.x86_64.rpm

Source:
71a97a11004793b0fd19c3bfe98f65917f05690079aaa77f629eb4553bb7dfae wireshark-1.8.10-7.el6_5.src.rpm