static bool show_message(struct pool *pool, json_t *val)
{
	char *msg;

	if (!json_is_array(val))
		return false;
	msg = (char *)json_string_value(json_array_get(val, 0));
	if (!msg)
		return false;
	applog(LOG_NOTICE, "%s message: %s", get_pool_name(pool), msg);
	return true;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.