CentOS Errata and Security Advisory 2006:0205
https://rhn.redhat.com/errata/RHSA-2006-0205.html
The following updated files have been uploaded and are currently syncing to the mirrors:
i386: libpng-1.2.7-1.el4.2.i386.rpm libpng-1.2.7-1.el4.2.x86_64.rpm libpng-devel-1.2.7-1.el4.2.i386x86_64
src: libpng-1.2.7-1.el4.2.src.rpm