Update: Joomla! 3.6.4 is now available: Please update your websites now! Download
Just days after the release of Joomla! 3.6.3, the Joomla! team is working on a major security fix. To keep your website secure, please be prepared to apply the Joomla! 3.6.4 security release, as soon as it becomes available on Tuesday, October 25th.
A Joomla! 3.6.4 release containing a security fix will be published on Tuesday 25th October at approximately 14:00 UTC.
The Joomla! Security Strike Team (JSST) has been informed of a critical security issue in the Joomla! core.Since this is a very important security fix, please be prepared to update your Joomla! installations next Tuesday.
Until the release is out, please understand that we cannot provide any further information.