librenms-librenms/html/includes/graphs/mempool/auth.inc.php

<?php

if (is_numeric($vars['id'])) {
    $mempool = dbFetchRow('SELECT * FROM `mempools` AS C, `devices` AS D where C.`mempool_id` = ? AND C.device_id = D.device_id', array($vars['id']));

    if (is_numeric($mempool['device_id']) && ($auth || device_permitted($mempool['device_id']))) {
        $device       = device_by_id_cache($mempool['device_id']);
        $rrd_filename = $config['rrd_dir'].'/'.$device['hostname'].'/'.safename('mempool-'.$mempool['mempool_type'].'-'.$mempool['mempool_index'].'.rrd');
        $title        = generate_device_link($device);
        $title       .= ' :: Memory Pool :: '.htmlentities($mempool['mempool_descr']);
        $auth         = true;
    }
}