The latest version of WordPress – WP 5.0.3 – went live on Wednesday 9 January 2019, and it’s working fine and as expected on my site here, and several clients who have minor version updates turned on.
This is a maintenance release, which fixes some minor items from the block editor and the customizer, as well as some upload bugs which had been happening for less common files.
It’s useful to update, but not an essential security release.
See the full release notes here.