Drupal core - SA-CORE-2026-011
Drupal core 11.2 and above integrate the HTMX JavaScript library.
Drupal core's XSS filter does not sufficiently sanitize certain HTMX attributes, which can lead to a cross-site scripting (XSS) vulnerability.
The vulnerability is mitigated by the fact an attacker must be able to insert HTML with specific attributes.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | drupal/core | >= 11.3.0, < 11.3.14, >= 11.4.0, < 11.4.4, >= 11.2.0, < 11.3.0 | 11.3.14, 11.4.4, 11.3.0 |
| Drupal (core) | drupal/core | >= 11.3.0, < 11.3.14, >= 11.4.0, < 11.4.4, >= 11.2.0, < 11.3.0 | 11.3.14, 11.4.4, 11.3.0 |
References
- Weakness (CWE)
-- Platform
- Composer, Drupal
- Package
drupal/core- Disclosed
- 15.07.2026
- Updated
- 11.10.2026 12:18
Sources and licenses
OSV / GitHub Advisory Database - DRUPAL-CORE-2026-011 - CC BY-SA 2.0; code GPL-2.0-or-later
Vulnerability history: drupal/core
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 146
- First → latest
- 02.2018 09.2026
- Without a fix
- 3
- Exploited in attacks
- 5
Severity breakdown
- Critical 15
- High 40
- Medium 60
- Low 5
- Unrated 26
Disclosures per year
- 2018: 4
- 2019: 14
- 2020: 12
- 2021: 11
- 2022: 55
- 2023: 6
- 2024: 23
- 2025: 8
- 2026: 13
-
Drupal core - SA-CORE-2026-011 this entry
Know which vulnerabilities affect your application
With the DockRay integration and software inventory enabled, DockRay checks reported component versions against known vulnerabilities and notifies you about confirmed matches. Coverage depends on the supported technology and available advisory data.