CVE-2026-55805

Name of the Vulnerable Software and Affected Versions Drupal core versions 0.0.0 through 10.6.13 Drupal core versions 11.3.0 through 11.3.14 Drupal core versions 11.4.0 through 11.4.4 Drupal core versions 0.0.0 through 11.0.x Drupal core versions 0.0.0 through 11.1.x Drupal core versions 0.0.0 through 11.2.x

Description Stored Cross-site Scripting (XSS) occurs because the Layout Builder module does not sufficiently sanitize block labels in certain scenarios. This allows an attacker to inject malicious scripts that are stored and later executed in the browser of another user. Exploitation requires both the attacker and the targeted user to be using the Layout Builder editing interface.

Recommendations Update Drupal core versions 0.0.0 through 10.6.13 to a version newer than 10.6.13. Update Drupal core versions 11.3.0 through 11.3.14 to a version newer than 11.3.14. Update Drupal core versions 11.4.0 through 11.4.4 to a version newer than 11.4.4. Update Drupal core versions 0.0.0 through 11.0.x to a version newer than 11.0.x. Update Drupal core versions 0.0.0 through 11.1.x to a version newer than 11.1.x. Update Drupal core versions 0.0.0 through 11.2.x to a version newer than 11.2.x.