As per the MediaWiki version lifecycle[1], I would like to announce the
formal end of life (EOL) of MediaWiki 1.39 as of December 31, 2025.
1.39.17 is expected to be the last release for this branch.
This means that MediaWiki 1.39 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 the next LTS, 1.43, which will be
supported until the end of December 2027. Or to either MediaWiki 1.44,
which will be supported until the end of July 2026, or to MediaWiki 1.45,
which will be supported until the end of December 2026.
Thanks!
[1] https://www.mediawiki.org/wiki/Version_lifecycle
Hi all,
This week, either on Tuesday or Wednesday, we will be issuing a security
and maintenance release to all supported branches of MediaWiki.
The new releases will be:
- 1.39.16
- 1.43.6
- 1.44.3
- 1.45.1
This will also resolve security issues in bundled extensions, along with
bug fixes included for maintenance reasons.
These security issues also affect many unsupported versions of MediaWiki.
We will make the fixes available in the respective release branches and
master in git. Tarballs will be available for the above mentioned point
releases as well.
A summary of some of the security fixes that have gone into non-bundled
MediaWiki extensions will also follow later.
As a reminder, MediaWiki 1.35 became end of life (EOL) in December 2023,
MediaWiki 1.40 became EOL in June 2024, MediaWiki 1.41 became EOL in
December 2024 and MediaWiki 1.42 became EOL in June 2025.
MediaWiki 1.39 (the old LTS before 1.43) becomes EOL at the end of the
month - December 2025. It is strongly recommended to upgrade to 1.43 (the
next LTS after 1.39), which will be supported until December 2027.
A formal EOL email for MediaWiki 1.39 will come later this month. This is
because as per our support policy, it is to be supported until the end of
the month, but we are not expecting any further changes to be made to the
branch.
More information on these timelines can be viewed on the Version lifecycle
page at [1].
[1] https://www.mediawiki.org/wiki/Version_lifecycle