The Debugger extension API in browser/extensions/api/debugger/debugger_api.cc in Google Chrome before 37.0.2062.94 does not validate a tab's URL before an attach operation, which allows remote attackers to bypass intended access limitations via an extension that uses a restricted URL, as demonstrated by a chrome:// URL.
https://src.chromium.org/viewvc/chrome?revision=280354&view=revision
https://exchange.xforce.ibmcloud.com/vulnerabilities/95472
http://www.securitytracker.com/id/1030767
http://www.securityfocus.com/bid/69401
http://www.debian.org/security/2014/dsa-3039
http://security.gentoo.org/glsa/glsa-201408-16.xml
http://secunia.com/advisories/61482
http://secunia.com/advisories/60268
http://lists.opensuse.org/opensuse-security-announce/2014-09/msg00027.html
http://googlechromereleases.blogspot.com/2014/08/stable-channel-update_26.html