dev-ruby/
public_suffix

Parse and decompose a domain name into top level domain, domain and subdomains

https://simonecarletti.com/code/publicsuffix-ruby/

There are no open security bugs.

You think something is missing here?
Start with filling a new security bug.

Please file new vulnerability reports on Gentoo Bugzilla and assign them to the Gentoo Security product and Vulnerabilities component.