You may see some downtime today (some services are already unavailable) due to an upcoming PHP security release.
https://wikitech.wikimedia.org/wiki/Incidents/2026-10-21_PHP_security_update/Community
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Oh, and some more info about all of this is now available: https://diff.wikimedia.org/2026/10/21/impact-of-php-vulnerabilities-on-wikimedia-tools-and-services/
We're actively doing updates so you may see some disruption.
If you are running anything PHP, now would be a good time for you to also do updates.
https://www.php.net/archive/2026.php?2026-10-21-5
PHP: News Archive - 2026