<?php
use Drupal\node\Entity\Node;

$node = Node::create([
  'type' => 'article',
  'title' => 'Vulnerability',
  'body' => [
     'value' => 'CVE-2019-6340'
   ],
   'moderation_state' => [
     'target_id' => 'published',
   ],
  'uid' => 1,
]);
$node->save();