CVE-2026-6367 Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-003
An attacker can inject malicious scripts into Drupal core pages, potentially stealing user sessions or executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-6367?
CVE-2026-6367 is a medium-severity cross-site scripting vulnerability in Drupal Drupal, published on 19 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS).
This issue affects Drupal core: from 11.3.0 before 11.3.7.
Weakness: CWE-79
Which versions are affected by CVE-2026-6367?
4 open source packages ship an affected version, including drupal/core and drupal. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
drupal/core Packagist | From 11.3.0 | 11.3.7 |
drupal/core Packagist | From 11.3.0 | 11.3.7 |
drupal/core Packagist | From 11.3.0 | 11.3.7 |
drupal Bitnami | From 11.3.0 | 11.3.7 |
Products include Drupal Drupal.
How do I fix CVE-2026-6367?
Upgrade drupal/core to 11.3.7 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-6367 being exploited?
There is no known exploitation of CVE-2026-6367 in the wild and no public exploit code.
Other vulnerabilities in Drupal Drupal
Sources
Also known as BIT-drupal-2026-6367, DRUPAL-CORE-2026-003, GHSA-pw6f-3999-xp7g.