[Wikitech-ambassadors] Tech News 2026 - Issue 44

Latest tech news from the Wikimedia technical community. Please tell other users about these changes. Not all changes will affect you. Translations are available.

Weekly highlight

• An experiment launched on September 29 is testing article recommendations for new account holders who also identify as readers. By suggesting articles to read, similar to recommendations in the Wikipedia app for logged-in readers, the experiment aims to encourage new account holders to read and return to the website regularly, with the goal of increasing internal referrals by 1%. See the related Community Wishlist proposal.
• Several Wikimedia services were taken offline last week because of a security vulnerability in PHP. This is because they need to be updated before they are safe to put back online. This is not a problem just for the Wikimedia movement but affects a lot of websites. You can follow updates on Wikitech. Cloud VPS and Toolforge will take longer to bring back online. This is to make sure that applications which run on Cloud VPS or Toolforge are not affected. Tool developers can see updates and more information on the Cloud-announce mailing list. [1][2]
• Last week we shared that to measure the impact of incorporating some community-requested features on logged-out reader retention, a test for the Image Carousel feature would be pushed to logged-out readers. Due to an issue, we will be restarting the test, but it will be live on October 26, not November 20 as initially announced.

Updates for editors

• A new bot detection system to better identify automated traffic that disguises itself as human visitors, is coming to the Wikimedia wikis. This might cause sudden changes to visitor statistics starting from 26 October, going back to 20 June 2026.
• The Score extension which renders musical notation inside wiki pages, has been temporarily disabled on all wikis due to a security issue. Affected pages will display a notice instead of musical scores, but the underlying code remains intact. No action is needed from editors, and a fix is in progress. A separate announcement will follow when the extension is re-enabled. Read more on Phabricator.
• View all 18 community-submitted tasks that were resolved last week. For example, the issue where CodeMirror syntax highlighter appears to have been enabled in error for existing editors has been fixed. [3]

Updates for technical contributors

• All wikis will be read-only for a few minutes on Wednesday, October 28 2026 at 15:00 UTC. This is for the datacenter server switchover backup tests, which happen twice a year. During the switchover, all Wikimedia website traffic is shifted from one primary data center to the backup data center to test availability and prevent service disruption even in emergencies. [4]

• Detailed code updates later this week: MediaWiki

Meetings and events

• Scholarship and sponsorship applications for the 2027 Wikimedia Hackathon will close on Friday, October 30th. Submit your application through Pretix before the deadline!