perl-Devel-StackTrace is the vector for a DoS attack against rt3 <= 3.6.6. Please update to a non-vulnerable version. See http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3502 and http://lists.bestpractical.com/pipermail/rt-announce/2008-June/000158.html for details.
Done. Will close once pushed.
Fixed version pushed to EPEL stable. Thanks Xavier :-)