WebKit in Apple iOS before 9.3.3, Safari before 9.1.2, and tvOS before 9.2.2 allows remote attackers to bypass the Same Origin Policy and obtain image date from an unintended web site via a timing attack involving an SVG document.
https://support.apple.com/HT206905
https://support.apple.com/HT206902
https://support.apple.com/HT206900
http://www.securitytracker.com/id/1036343
http://www.securityfocus.com/bid/91830
http://www.securityfocus.com/archive/1/539295/100/0/threaded
http://packetstormsecurity.com/files/138502/WebKitGTK-SOP-Bypass-Information-Disclosure.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00004.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00003.html
http://lists.apple.com/archives/security-announce/2016/Jul/msg00001.html