CVE-2019-6340: Drupal Core Remote Code Execution Vulnerability

High severity, CVSS 8.1. Actively exploited: in CISA KEV since 2022-03-25. EPSS: 92% chance of exploitation in the next 30 days.

Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10. This can lead to arbitrary PHP code execution in some cases. A site is only affected by this if one of the following conditions is met: The site has the Drupal 8 core RESTful Web Services (rest) module enabled and allows PATCH or POST requests, or the site has another web services module enabled, like JSON:API in Drupal 8, or Services or RESTful Web Services in Drupal 7. (Note: The Drupal 7 Services module itself does not require an update at this time, but you should apply other contributed updates associated with this advisory if Services is in use.)

Affected products

• Drupal Drupal: from 8.5.0, before 8.5.11 (fixed in 8.5.11); from 8.6.0, before 8.6.10 (fixed in 8.6.10)

Published 2019-02-21. Last modified 2026-06-17.