NOTE: This release has been recalled due to a security bug found involving magic_quotes_gpc.

The latest version in the PHP 5.2.x series has been released today - PHP 5.2.7:

The PHP development team would like to announce the immediate availability of PHP 5.2.7. This release focuses on improving the stability ofthe PHP 5.2.x branch with over 120 bug fixes, several of which are security related. All users of PHP are encouraged to upgrade to this release.

These security updates include an update of the PCRE version, fixing an incorrect order with php_value, correcting a possible overflow in memnstr and more. Check out the full Changelog for more information on these updates and improvements. You can download this latest update from the PHP.net website (or your favorite mirror).