Maintenance and security release of the Drupal 8 series.
This release fixes security vulnerabilities. Sites are urged to upgrade immediately after reading the notes below and the security announcement:
Drupal Core - Multiple vulnerabilities - SA-CORE-2018-006
No other fixes are included.
Sites on 8.5.x should update immediately to Drupal 8.5.8 instead, and plan to update to the latest 8.6.x release before May 2019.
Пошаговое описание обновления системы до новой версии смотрите в документации.