Drupal Core SA-CORE-2019-009 Denial of Service Vulnerability



Date Discovered

December 18, 2019


Drupal Core is prone to a remote denial-of-service vulnerability. An attacker can leverage this issue to cause denial-of-service condition. The following versions are vulnerable: Drupal 8.7.x versions prior to 8.7.11. Drupal 8.8.x versions prior to 8.8.1.

Technologies Affected

  • Drupal Drupal 8.7.0
  • Drupal Drupal 8.7.1
  • Drupal Drupal 8.7.10
  • Drupal Drupal 8.7.4
  • Drupal Drupal 8.7.5
  • Drupal Drupal 8.7.8
  • Drupal Drupal 8.7.9
  • Drupal Drupal 8.8.0


Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, run all applications with the minimal amount of privileges required for functionality.

Updates are available. Please see the references or vendor advisory for more information.



Drew Webber of the Drupal Security Team

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