WordPress 6.6.2, released on September 10, 2024, brings 15 bug fixes to Core and 11 to the Block Editor. Led by Tonya Mork and Vicente Canales, with Aaron Jorbin mentoring the team, this is a short-cycle maintenance release ahead of WordPress 6.7, scheduled for November 12, 2024.

This update addresses 15 Core issues, including CSS specificity changes in certain themes and the resolution of Button Block CSS conflicts. Other notable improvements include:

This release addresses 11 issues in the Block Editor, including improved layout style specificity in the non-iframed editor and fixes for pseudo-element selectors in custom block CSS. The release also reduces the specificity of the default featured-image block style rules and prevents the duplication of template parts in non-block-based themes. Post Editor has received multiple improvements.

Tonya Mork's post gives the complete list of bug fixes in WordPress 6.6.2.

Websites with automatic background updates will automatically get updated to WordPress 6.6.2 while others can download it from WordPress.org or update the website via the WordPress Dashboard.