The following errata for CentOS-2 have been built and uploaded to the centos mirror:

RHSA-2005:761-02 Moderate: pcre security update



Files available:
pcre-3.4-2.2.i386.rpm
pcre-devel-3.4-2.2.i386.rpm

More details are available from the RedHat web site at https://rhn.redhat.com/errata/rh21as-errata.html

The easy way to make sure you are up to date with all the latest patches is to run:
# yum update