CPAN 2.28 allows Signature Verification Bypass.
blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html
blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SD6RYOJII7HRJ6WVORFNVTYNOFY5JDXN/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SZ32AJIV4RHJMLWLU5QULGKMMIHYOMDC/
metacpan.org/pod/distribution/CPAN/scripts/cpan