An issue was discovered in MediaWiki through 1.37.1. The CentralAuth extension mishandles a ttl issue for groups expiring in the future.
https://security.gentoo.org/glsa/202305-24
https://phabricator.wikimedia.org/T302248
https://gerrit.wikimedia.org/r/q/Ic6ba1a37b78df5b342ceeba4c1493dbde583b81f