I am putting a unique string of text onto a PDF document using PDF::API2. Here is the minimal code to demonstrate: 

#!/usr/bin/perl -T

use CGI::Carp qw(fatalsToBrowser);

use FindBin qw($RealBin);
my $safepath;
BEGIN {
    if ($RealBin =~ m!^(/home/...path.to.site.../(test|uk)/www)!) {
        $safepath = "$1/../lib";
    } else {
        die "Insecure access!";
    }
}
use lib "$safepath";

use cPanelUserConfig;
use PDF::API2;

use strict;
use warnings;

my $pdf  = PDF::API2->open("$ENV{'DOCUMENT_ROOT'}/../data/xmas/GiftSub
+scription.pdf");
my $font = $pdf->font("$ENV{'DOCUMENT_ROOT'}/../data/xmas/Merriweather
+.ttf");

my $page = $pdf->open_page(1);
my $text = $page->text;

$text->font($font, 36);
$text->position(656, 403);
$text->text('ABC-123');

$pdf->save("$ENV{'DOCUMENT_ROOT'}/test.pdf");

print "Content-type: text/plain\n\n";
print "$ENV{'HTTP_HOST'}/test.pdf\n";

[download]
This works as expected when taint mode is off. But, once taint mode is turned on I get: 
Insecure dependency in open while running with -T switch at /usr/lib64
+/perl5/IO/File.pm line 187

[download]

I have replaced $ENV{'DOCUMENT_ROOT'} with hardcoded paths to ensure that it is not this that is causing the problem.

Is it possible to use PDF::API2 in taint mode or do I have to choose between finding another module or turning off taint mode?

In reply to Insecure Dependency in Taint Mode by Bod

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