Apple has issued a security update for Safari for Mac today, addressing a couple of issues with WebKit.

The updates clock in at version numbers 8.0.4, 7.1.4, and 6.2.4 for OS X Yosemite, Mavericks, and Mountain Lion respectively. Here's the full breakdown from the changelog:

Impact: Visiting a maliciously crafted website may lead to an unexpected application termination or arbitrary code execution

Description: Multiple memory corruption issues existed in WebKit. These issues were addressed through improved memory handling.

Impact: Inconsistent user interface may prevent users from discerning a phishing attack

Description: A user interface inconsistency existed in Safari that allowed an attacker to misrepresent the URL. This issue was addressed through improved user interface consistency checks.

You should be able to snag the update by checking the "updates" section in the Mac App Store now.

Thanks to Jack for the tip!

Source: Apple