On Wednesday, Apple released an updated version of Safari for OS X Yosemite, OS X Mavericks, and OS X Mountain Lion. They are named version 8.0.6, 7.1.6, and 6.2.6 respectively for each operating system version.
The updates are available under the Updates tab in the Mac App Store application on any OS X machine running one of the three aforementioned operating systems. The updated Safari patches some security vulnerabilities that were discovered to be present in WebKit:
Originally Posted by Apple