Drupal 11.4 is the next minor release in the 11.x branch, with a stable launch planned for the week starting June 22, 2026. It doesn't break backward compatibility for public APIs, but it brings plenty of concrete improvements: PHP attribute routing, a new bootstrap based on Symfony Runtime, Brotli compression for assets, SEO-oriented robots.txt changes, and a whole list of deprecations worth handling in custom modules.