As per the MediaWiki version lifecycle[1], I would like to announce the
formal end of life (EOL) of MediaWiki 1.36 as of today, Friday June 3, 2022.
This means that MediaWiki 1.36 will no longer receive maintenance or
security backports. It is therefore strongly discouraged that you continue
to use it.
It is recommended to upgrade either to MediaWiki 1.37, which will be
supported until November 2022 or to 1.38 (released yesterday), which will
be supported until June 2023.
Thanks!
Sam Reed
[1]
https://www.mediawiki.org/wiki/Version_lifecycle