DRUPAL-CORE-2026-013

The Drupal project uses the [CKEditor](https://github.com/ckeditor/ckeditor5) library for WYSIWYG editing.

Not rated yet Packagist

Severity: Not rated yet; No source has published a CVSS score yet
Exploit chance (EPSS): —; No score published
Known exploited: No; Not in CISA's catalog
Weakness: —; Not classified
Fix: 11.4.7; Upgrade drupal/core to this version or later

Description

The Drupal project uses the CKEditor library for WYSIWYG editing. CKEditor has released a security update that impacts Drupal.

Vulnerabilities are possible if Drupal is configured to use CKEditor for WYSIWYG editing. An attacker that can create or edit content (even without access to CKEditor themselves) may be able to exploit this Cross-Site Scripting (XSS) vulnerability to target users with access to the WYSIWYG CKEditor, including site admins with privileged access.

For more information, see CKEditor's security advisory:

High-severity Cross-site scripting (XSS) in the engine package

Affected versions

Packagist

Package	Vulnerable	Fixed in
drupal/core	`>= 10.5.0, < 10.6.17` `>= 11.0.0, < 11.3.17` `>= 11.4.0, < 11.4.7`	`10.6.17` `11.3.17` `11.4.7`

How to fix

Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.

drupal/core Packagist → `11.4.7`

composer

composer require drupal/core:^11.4.7

References

Timeline

Sep 16, 2026 Published
Sep 16, 2026 Last updated by the source

Advisory	Severity	Why it's related
DRUPAL-CORE-2026-004 Drupal Core has a SQL Injection issue	Critical Known exploited	Also affects drupal/core
CVE-2020-28949 Multiple vulnerabilities through filename manipulation in Archive_Tar	High Known exploited	Also affects drupal/core
CVE-2020-13671 Drupal core Unrestricted Upload of File with Dangerous Type	High Known exploited	Also affects drupal/core
CVE-2019-6340 Drupal Core Remote Code Execution Vulnerability	High Known exploited	Also affects drupal/core
CVE-2018-7602 Drupal Core Remote Code Execution Vulnerability	Critical Known exploited	Also affects drupal/core
CVE-2018-7600 Drupal Core Remote Code Execution Vulnerability	Critical Known exploited	Also affects drupal/core
DRUPAL-CORE-2026-016 The Navigation module doesn't sufficiently sanitize certain attributes, which can lead to a cross-site scripting (XSS) vulnerability.	Not rated yet	Also affects drupal/core
DRUPAL-CORE-2026-015 The Drupal core Link module provides a field type that can be used for internal and external URLs.	Not rated yet	Also affects drupal/core

Credits: Piotrek Koszuliński (Reinmar)

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