The Perl 5 module WWW::Mechanize::GZip tries to fetch a URL by requesting gzip-compression from the webserver. If the response contains a header with 'Content-Encoding: gzip', it decompresses the response in order to get the original (uncompressed) content.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.