Just a week after the Windows 10 May 2019 Update was released to the general public, version 1903 getting its first public cumulative update, which brings the build number to 18362.145
Build 18362.145 RSS
Today, Microsoft released a cumulative update for Windows 10 version 1903 to Insiders on the Slow and Release Preview rings. It contains a bunch of fixes, and no new front-facing features.