You need to escape the @ somehow so perl does not try to interpolate it: 

my $query = '/nvd/entry[@id = ' . $cve_id . ']';

[download]
or 
my $query = "/nvd/entry[\@id = $cve_id]";

[download]

-derby

In reply to Re^4: XPath query issue... by derby
in thread XPath query issue... by spstansbury

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