Bit of an epidemic now: https://blog.urth.org/2021/03/29/security-issues-in-perl-ip-address-distros/ According to URL this is unpatched.
Looks like there's a potential patch from NixOS: https://github.com/NixOS/nixpkgs/pull/118043
This is a duplicate of bug 779172, which indicates that Net-CIDR-Lite needs to be bumped to 0.220.0 to address the issue.
*** This bug has been marked as a duplicate of bug 779172 ***