Google Chrome before 4.0.249.89 attempts to make direct connections to web sites when all configured proxy servers are unavailable, which allows remote HTTP servers to obtain potentially sensitive information about the identity of a client user via standard HTTP logging, as demonstrated by a proxy server that was configured for the purpose of anonymity.
code.google.com/p/chromium/issues/detail?id=12303
googlechromereleases.blogspot.com/2010/02/stable-channel-update.html
secunia.com/advisories/38545
securitytracker.com/id?1023583
sites.google.com/a/chromium.org/dev/Home/chromium-security/chromium-security-bugs
www.osvdb.org/62315
www.securityfocus.com/bid/38177
www.vupen.com/english/advisories/2010/0361
exchange.xforce.ibmcloud.com/vulnerabilities/56212
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14500