Man pages matching name cgi::session::id::md5 in section 3pm:

CGI::Session::ID::md5.3pm.en	debian 10 / libcgi-session-perl
CGI::Session::ID::md5.3pm.en	debian 11 / libcgi-session-perl
CGI::Session::ID::md5.3pm.en	debian 12 / libcgi-session-perl