1 files changed, 1 insertions, 0 deletions
diff --git a/showdependencygraph.cgi b/showdependencygraph.cgi
index b15fe8d44..f15534be3 100755
--- a/showdependencygraph.cgi
+++ b/showdependencygraph.cgi
@@ -26,6 +26,7 @@ use strict;
 require "CGI.pl";
 
 my $id = $::FORM{'id'};
+die "Invalid id: $id" unless $id =~ /^\s*\d+\s*$/;
 my $urlbase = Param("urlbase");
 
 my %seen;