Google Chrome before 26.0.1410.43 does not ensure that an extension has the tabs (aka APIPermission::kTab) permission before providing a URL to this extension, which has unspecified impact and remote attack vectors.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16363
https://code.google.com/p/chromium/issues/detail?id=168442
http://googlechromereleases.blogspot.com/2013/03/stable-channel-update_26.html