Hi all,

we had reports of a serious authentication error that resulted in people being logged into the wrong account. We are trying to collect information about what happened, and how many users it might have happened to. Please reach out to users on your wikis and ask them if they have experienced anything like that in the last two weeks. If someone did, please tell us here or at https://phabricator.wikimedia.org/T126069 (where you can also find more information about the issue).

To be on the safe side, we are in the process of logging everyone out (which takes a while, so it might have happened to you this week, or it might happen in the next few days). Apologies for the inconvenience.

Thanks, Gergő [[User:Tgr_(WMF)]]