Format string vulnerability in the zend_throw_or_error function in Zend/zend_execute_API.c in PHP 7.x before 7.0.1 allows remote attackers to execute arbitrary code via format string specifiers in a string that is misused as a class name, leading to incorrect error handling.
https://github.com/php/php-src/commit/b101a6bbd4f2181c360bd38e7683df4a03cba83e