Apple has pushed out Safari 7.0.4 in the Mac App Store, which according to the update details “contains improvements to security”.

According to the Apple’s support document on the security content of this update, the following security issues within WebKit were fixed in Safari 7.0.4 and Safari 6.1.4 for OS X Mountain Lion and Lion:

• Multiple memory corruption issues existed in WebKit. These issues were addressed through improved memory handling.
• An encoding issue existed in the handling of unicode characters in URLs. A maliciously crafted URL could have led to sending an incorrect postMessage origin. This issue was addressed through improved encoding/decoding.

Safari 7.0.3 was released just under a week ago with OS X Mavericks 10.9.3. Apple recommends all OS X Mavericks users to update to Safari 7.0.4.