On PHP.net today they've announced the release of the latest versions in the PHP 5.3 and 5.4 series - PHP 5.4.16 and PHP 5.3.26.

The PHP development team announces the immediate availability of PHP 5.4.16 and PHP 5.3.26. These releases fix about 15 bugs, including CVE-2013-2110. All users of PHP are encouraged to upgrade to PHP 5.4.16.

You can download these latest release from the usual spots and check out a list of what changed in the Changelog