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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2026-0367
Multiple Vulnerabilities in Drupal

Original Issue Date:July 17, 2026

Severity Rating: HIGH

Software Affected

  • Drupal Core version prior to 10.6.13
  • Drupal Core versions 11.3.0 to 11.3.13
  • Drupal Core versions 11.4.0 to 11.4.3
  • Drupal Core versions 11.0.x
  • Drupal Core versions 11.1.x
  • Drupal Core versions 11.2.x

Overview

Multiple vulnerabilities have been reported in Drupal core which could allow an attacker to disclose sensitive information and perform cross-site scripting (XSS) attacks on the targeted system.

Target Audience:
Individuals and end-user organizations using Drupal.

Risk Assessment:
High risk of unauthorized access, cross-site scripting (XSS) attacks.

Impact Assessment:
Potential for data exposure, unauthorized access to sensitive information and potential compromise of system.

Description

Drupal is an open-source, content management system (CMS) which allows individuals and organizations to create, manage and maintain websites and web applications.

These vulnerabilities exist in a Drupal core due to insufficient access check for image style derivatives, improper sanitization of certain HTMX attributes and improper sanitisation of block labels in certain scenarios. An attacker could exploit these vulnerabilities by sending specially crafted inputs.

Successful exploitation of these vulnerabilities could allow an attacker to disclose sensitive information and perform cross-site scripting (XSS) attacks on the targeted system.
Note: Drupal 10.5.x, Drupal 11.2.x and all prior releases have reached end-of-life and no longer receive security support. Drupal 8 and Drupal 9 have also reached end-of-life.

Solution

Upgrade to the latest versions as mentioned in the security advisories:
https://www.drupal.org/sa-core-2026-010

https://www.drupal.org/sa-core-2026-011

https://www.drupal.org/sa-core-2026-012

Vendor Information

Drupal
https://www.drupal.org

References

Drupal
https://www.drupal.org/sa-core-2026-010
https://www.drupal.org/sa-core-2026-011
https://www.drupal.org/sa-core-2026-012

CVE Name
CVE-2026-15916
CVE-2026-15917
CVE-2026-55805

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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