CPAN.pm before 2.35 does not verify TLS certificates when downloading distributions over HTTPS.
www.openwall.com/lists/oss-security/2023/04/29/1
www.openwall.com/lists/oss-security/2023/05/03/3
www.openwall.com/lists/oss-security/2023/05/03/5
www.openwall.com/lists/oss-security/2023/05/07/2
blog.hackeriet.no/perl-http-tiny-insecure-tls-default-affects-cpan-modules/
github.com/andk/cpanpm/pull/175
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BM6UW55CNFUTNGD5ZRKGUKKKFDJGMFHL/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LEGCEOKFJVBJ2QQ6S2H4NAEWTUERC7SB/
metacpan.org/dist/CPAN/changes
security.netapp.com/advisory/ntap-20240621-0007/
www.openwall.com/lists/oss-security/2023/04/18/14