loader/DocumentThreadableLoader.cpp in the XMLHttpRequest implementation in WebCore in WebKit before r58409 does not properly handle credentials during a cross-origin synchronous request, which has unspecified impact and remote attack vectors, aka rdar problem 7905150.

page/Geolocation.cpp in WebCore in WebKit before r56188 and before 1.2.5 does not properly restrict access to the lastPosition function, which has unspecified impact and remote attack vectors, aka rdar problem 7746357.

The image decoder in WebKit before r52833, as used in Google Chrome before 4.0.249.78, does not properly handle a failure of memory allocation, which allows remote attackers to execute arbitrary code in the Chrome sandbox via a malformed GIF file that specifies a large size.

WebKit before r51295, as used in Google Chrome before 4.0.249.78, presents a directory-listing page in response to an XMLHttpRequest for a file:/// URL that corresponds to a directory, which allows attackers to obtain sensitive information or possibly have unspecified other impact via a crafted local HTML document.

WebKit before r52784, as used in Google Chrome before 4.0.249.78 and Apple Safari before 4.0.5, permits cross-origin loading of CSS stylesheets even when the stylesheet download has an incorrect MIME type and the stylesheet document is malformed, which allows remote attackers to obtain sensitive information via a crafted document.

WebKit before r53525, as used in Google Chrome before 4.0.249.89, allows remote attackers to execute arbitrary code in the Chrome sandbox via a malformed RUBY element, as demonstrated by a <ruby>><table><rt> sequence.