On August 14, 2019 The Document Foundation announced LibreOffice 6.2.6, the sixth minor release of the LibreOffice 6.2 family, targeted at users in production environments. All users of LibreOffice 6.1.x and LibreOffice 6.2.x versions should upgrade immediately for enhanced security, as the software includes both security fixes and some months of back-ported fixes. See their blog post.
(LibreOffice 6.2 and 6.3 are concurrent releases. LibreOffice 6.3 represents the bleeding edge in term of features for open source office suites, and is targeted at technology enthusiasts, early adopters and power users. V6.2 is for users in production environments.)