On the PHP.net site they've posted an announcement about the latest release in the PHP 7.1.x series: PHP 7.1.9.

The PHP development team announces the immediate availability of PHP 7.1.9. This is a bugfix release, with several bug fixes included. All PHP 7.1 users are encouraged to upgrade to this version.

Bugs fixed in this release include functionality in the core of the language, cURL handling, internationalization and MySQLi functionality. You can see the full list of changes in the full Changelog. As always you can download this release from the usual places: the downloads page for the source release and windows.php.net for the Windows binaries.