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

<?php

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

    if (is_numeric($mempool['device_id']) && ($auth || device_permitted($mempool['device_id']))) {
        $device = device_by_id_cache($mempool['device_id']);
        $rrd_filename = Rrd::name($device['hostname'], ['mempool', $mempool['mempool_type'], $mempool['mempool_class'], $mempool['mempool_index']]);
        $title = generate_device_link($device);
        $title .= ' :: Memory Pool :: ' . htmlentities($mempool['mempool_descr']);
        $auth = true;
    }
}