Google Chrome before 40.0.2214.91, when the Harmony proxy in Google V8 is enabled, allows remote attackers to bypass the Same Origin Policy via crafted JavaScript code with Proxy.create and console.log calls, related to HTTP responses that lack an “X-Content-Type-Options: nosniff” header.
googlechromereleases.blogspot.com/2015/01/stable-update.html
lists.opensuse.org/opensuse-security-announce/2015-03/msg00005.html
rhn.redhat.com/errata/RHSA-2015-0093.html
secunia.com/advisories/62383
secunia.com/advisories/62665
security.gentoo.org/glsa/glsa-201502-13.xml
www.securityfocus.com/bid/72288
www.securitytracker.com/id/1031623
code.google.com/p/chromium/issues/detail?id=399951