Paranoid Android can protect you from this potential vulnerability until Apple makes an official fix available. It does this by watching the URL schemes that are requested and delaying them until you've had a chance to say whether you'd like to proceed or not. If you know that the url that's being loaded is legit, go ahead, but if it looks suspicious, Paranoid Android gives you an opportunity to cancel it.
A vulnerability in Apple's Mac OS X results in a potential situation in which a malicious person could execute arbitrary commands on your machine, such as deleting your home directory, or doing other harmful actions. This vulnerability
Paranoid Android can now notify you when a file is launched with a custom application (one other than the default one for the document's file type). This does not affect opening documents from within applications. Updated to mitigate the recent Safari/LaunchServices exploit
Mac OS X 10.3 or later
*Previously available here