Read the full story https://wordpress.org/news/2017/04/wordpress-4-7-4/
After almost sixty million downloads of WordPress 4.7, we are pleased to announce the immediate availability of WordPress 4.7.4, a maintenance release.
This release contains 47 maintenance fixes and enhancements, chief among them an incompatibility between the upcoming Chrome version and the visual editor, inconsistencies in media handling, and further improvements to the REST API. For a full list of changes, consult the release notes and the list of changes.
Download WordPress 4.7.4 or visit Dashboard → Updates and simply click “Update Now.” Sites that support automatic background updates are already beginning to update to WordPress 4.7.4.
Thanks to everyone who contributed to 4.7.4:
Aaron Jorbin, Adam Silverstein, Andrea Fercia, Andrew Ozz, aussieguy123, Blobfolio, boldwater, Boone Gorges, Boro Sitnikovski, chesio, Curdin Krummenacher, Daniel Bachhuber, Darren Ethier (nerrad), David A. Kennedy, davidbenton, David Herrera, Dion Hulse, Dominik Schilling (ocean90), eclev91, Ella Van Dorpe, Gustave F. Gerhardt, ig_communitysites, James Nylen, Joe Dolson, John Blackbourn, karinedo, lukasbesch, maguiar, MatheusGimenez, Matthew Boynes, Matt Wiebe, Mayur Keshwani, Mel Choyce, Nick Halsey, Pascal Birchler, Peter Wilson, Piotr Delawski, Pratik Shrestha, programmin, Rachel Baker, sagarkbhatt, Sagar Prajapati, sboisvert, Scott Taylor, Sergey Biryukov, Stephen Edgar, Sybre Waaijer, Timmy Crawford, vortfu, and Weston Ruter.