WebKitGTK 2.34.4 is now available. As with most WebKitGTK releases, this release fixes numerous security issues, including an especially severe issue that allowed websites to read the names of IndexedDB databases created by other websites. This is very easy to exploit and allows any website to see sensitive private information, such as your Google account identifier. It’s also possible to determine whether the user is browsing certain websites in other tabs, depending on how those websites use IndexedDB. Needless to say, this is very bad, and you are urged to update to WebKitGTK 2.34.4 ASAP to protect your users.
The “Safari leaks” vulnerability affects WebKitGTK 2.34.0 through 2.34.3.