The text-editing implementation in Google Chrome before 5.0.375.127, and webkitgtk before 1.2.6, does not check a node type before performing a cast, which has unspecified impact and attack vectors related to (1) DeleteSelectionCommand.cpp, (2) InsertLineBreakCommand.cpp, or (3) InsertParagraphSeparatorCommand.cpp in WebCore/editing/.
Google Chrome before 5.0.375.127, and webkitgtk before 1.2.6, does not properly implement the history feature, which might allow remote attackers to spoof the address bar via unspecified vectors.
Multiple use-after-free vulnerabilities in WebKit, as used in Apple Safari before 4.1.3 and 5.0.x before 5.0.3, Google Chrome before 5.0.375.127, and webkitgtk before 1.2.6, allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors related to improper handling of MIME types by plug-ins.
Google Chrome before 5.0.375.127 and webkitgtk before 1.2.6 do not properly support the Ruby language, which allows attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via unknown vectors.