CVE-2026-6365: Drupal Core AJAX Modal Dialog XSS Vulnerability

drupal/core Updated 16 Apr 2026

Summary

15/04/2026

Disclosed on

CVE-2026-6365

CVE

Yes i

Fix available

Moderate

Severity

6.1

CVSS Score

CVE-2026-6365: Drupal core's jQuery integration for AJAX modal dialog boxes does not sufficiently sanitize certain options, which which can lead to a cross-site scripting (XSS) vulnerability. Affects drupal/core across 4 version ranges.

>= 8.0.0, < 10.5.9 >= 10.6.0, < 10.6.7 >= 11.0.0, < 11.2.11 >= 11.3.0, < 11.3.7

Fixed in 4 releases; the minimum fixed version depends on the release line you run. How to fix ↓

Also tracked for

drupal · Bitnami

The same CVE-2026-6365 is tracked separately for each ecosystem and vendor. Its fix information is the same; the package and affected versions differ.

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Background

Drupal is a widely-used open-source content management system (CMS) that allows users to build and manage websites. It is known for its flexibility, scalability, and a large ecosystem of modules and themes. However, like any software, it can have vulnerabilities. The specific vulnerability in question affects the jQuery integration for AJAX modal dialog boxes within Drupal, which is crucial for creating dynamic user interfaces.

Vulnerability Detail

The vulnerability arises from insufficient sanitization of certain options in Drupal's jQuery integration for AJAX modal dialog boxes. This flaw can lead to cross-site scripting (XSS) attacks, where an attacker can inject malicious scripts into web pages viewed by other users. The implications of this vulnerability are severe, as it can compromise user data, session information, and overall site integrity, potentially leading to unauthorized actions on behalf of users.

How To Fix

Fixed versions by release line

The minimum fixed version depends on the release line you run.

>= 8.0.0, < 10.5.9 10.5.9
```
composer require drupal/core:10.5.9
```
>= 10.6.0, < 10.6.7 10.6.7
```
composer require drupal/core:10.6.7
```
>= 11.0.0, < 11.2.11 11.2.11
```
composer require drupal/core:11.2.11
```
>= 11.3.0, < 11.3.7 11.3.7
```
composer require drupal/core:11.3.7
```

Tip — Not sure which release line you're on? Vulert can find the fix for the version you are using. Scan free →

Workaround

Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the available patches as soon as possible.

Conclusion

The CVE-2026-6365 vulnerability in Drupal core poses a significant risk due to its potential for XSS attacks. It is crucial for users to update their installations to the patched versions to safeguard their sites. Regular monitoring with tools like Vulert can help maintain security against such vulnerabilities.

See every vulnerability recorded for drupal/core →