Google Chrome before 14.0.835.202 does not properly restrict access to the window prototype, which allows remote attackers to bypass the Same Origin Policy via unspecified vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14470
http://googlechromereleases.blogspot.com/2011/10/stable-channel-update.html