Cumulative update for our on-premises product SharePoint Server 2019, also called as public update.
This month only for language independent, there was no language dependent yet.
KB 4461548 Language Independent package
Download it from: https://www.microsoft.com/en-us/download/details.aspx?id=57649
After installing the fixes you need to run the SharePoint 2019 Products Configuration Wizard on each machine in the farm. If you prefer to run the command line version psconfig.exe ensure to have a look here for the correct options.
SharePoint 2019 PU Build Number: for the language independent 16.0.10339.12102
KB 4011027 Update for Office Online Server 2019
Download it from: https://www.microsoft.com/en-us/download/details.aspx?id=57629
New/Old features with SharePoint 2019