The extensions subsystem in Google Chrome before 53.0.2785.113 does not properly restrict access to Object.prototype, which allows remote attackers to load unintended resources, and consequently trigger unintended JavaScript function calls and bypass the Same Origin Policy via an indirect interception attack.
https://security.gentoo.org/glsa/201610-09
https://googlechromereleases.blogspot.com/2016/09/stable-channel-update-for-desktop_13.html
https://codereview.chromium.org/1840453002
http://www.securitytracker.com/id/1036826
http://www.securityfocus.com/bid/92942