An update outlining the work to bring back affected tools:
https://diff.wikimedia.org/2026/10/21/impact-of-php-vulnerabilities-on-wikimedia-cloud-services/

Best,


*Johan Jönsson*Manager, Movement Communications
Wikimedia Foundation <https://wikimediafoundation.org/>


On Wed, Oct 21, 2026 at 12:19 PM Johan Jönsson <[email protected]>
wrote:

> Some updates on affected services are posted here:
>
> https://wikitech.wikimedia.org/wiki/Incidents/2026-10-21_PHP_security_update/Community
>
> Best,
>
>
> *Johan Jönsson*Manager, Movement Communications
> Wikimedia Foundation <https://wikimediafoundation.org/>
>
>
> On Wed, Oct 21, 2026 at 12:10 AM Johan Jönsson <[email protected]>
> wrote:
>
>> Hey everyone – due to a critical security advisory about the PHP language
>> <https://www.php.net/archive/2026.php#2026-10-20-1> (which we depend
>> on), many Wikimedia services are going to be affected. We are hoping to
>> avoid downtime to the wikis, but some supporting tools and services are
>> unfortunately going to be impacted. This is a complex operation on short
>> notice and we are still figuring out the details. More information will
>> come later this week.
>>
>> Best,
>>
>>
>> *Johan Jönsson*Manager, Movement Communications
>> Wikimedia Foundation <https://wikimediafoundation.org/>
>>
>
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