Current version in portage is 4.5.21 from 2017. There have been many (bugfix) releases since then. Just "cp /mod_wsgi-4.5.21.ebuild mod_wsgi-4.6.5.ebuild" worked for me.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=65ca8c91bdc54d11a80868489c03c0ab8e17afcf commit 65ca8c91bdc54d11a80868489c03c0ab8e17afcf Author: Dirkjan Ochtman <djc@gentoo.org> AuthorDate: 2019-03-20 19:51:02 +0000 Commit: Dirkjan Ochtman <djc@gentoo.org> CommitDate: 2019-03-20 19:51:18 +0000 www-apache/mod_wsgi: version bump to 4.6.5 Closes: https://bugs.gentoo.org/show_bug.cgi?id=673526 Signed-off-by: Dirkjan Ochtman <djc@gentoo.org> Package-Manager: Portage-2.3.62, Repoman-2.3.11 www-apache/mod_wsgi/Manifest | 1 + www-apache/mod_wsgi/mod_wsgi-4.6.5.ebuild | 38 +++++++++++++++++++++++++++++++ 2 files changed, 39 insertions(+)