Bugzilla Bug 50599

in portage only 3.04 
but CGI 3.05 include many fixes

Version 3.05

   1. Fixed uninitialized variable warning on start_form() when running from command line.
   2. Fixed CGI::_set_attributes so that attributes with a - are handled correctly.
   3. Fixed CGI::Carp::die() so as to avoid problems from _longmess() clobbering @_.
   4. If HTTP_X_FORWARDED_HOST is defined (i.e. running under a proxy), the various functions that return HOST will use that instead.
   5. Fix for undefined utf8() call in CGI::Util.
   6. Changed the call to warningsToBrowser() in CGI::Carp::fatalsToBrowser to call only after HTTP header is sent (thanks to Didier Lebrun for noticing).
   7. Patches from Dan Harkless to make CGI.pm validatable against HTML 3.2.
   8. Fixed an extraneous "foo=bar" appearing when extra style parameters passed to start_html;
   9. Fixed potential cross-site scripting bug in startform().
  10. Fixed documentation to discuss list context behavior of form-element generators explicitly.
  11. Fixed incorrect results from end_form() when called in OO manner.
  12. Fixed query string stripping in order to handle URLs containing escaped newlines.
  13. During server push, set NPH to 0 rather than 1. This is supposed to fix problems with Apache.
  14. Fixed incorrect processing of multipart form fields that contain embedded quotes. There's still the issue of how to handle ones that contain embedded semicolons, but no one has complained (yet).
  15. Fixed documentation bug in -style argument to start_html()
  16. Added -status argument to redirect().

It builds successfully just renaming the 3.04 -> 3.05 ebuild.

Yes
renaming the 3.04 -> 3.05 ebuild is work for me
but it must add to portage
my test ebuild available here
http://bor.org.ua/projects/portage/dev-perl/CGI/

done