I think you have to assign to the string to untaint it, something like

if ( $outfile =~ m{\A(\w+)\z} )
{
    $outfile = $1;
    open my $outFH, q{>}, $outfile
       or dir qq{open: $outfile: $!\n};
}
else
{
    die qq{Disallowed characters in filename\n};
}

[download]

I hope this is helpful.

Cheers,

JohnGG

In reply to Re: Insecure dependency in open while running with -T switch by johngg
in thread Insecure dependency in open while running with -T switch by vit

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