On September 4th 2015, the PHP group released PHP 5.6.13.
11 security-related issues were fixed in this release. All PHP 5.6 users are encouraged to upgrade to this version.
PHP 5.6.13 packages are now available for Debian 7 “Wheezy”, on both amd64 and i386 architectures, in ZTS and non-ZTS (default) flavors, along with the usual PECL extensions.
Note : php5-memcached still lacks JSON support.