Vulnerability · Published Jul 10, 2026 · Assigned by drupal
CVE-2026-55808Drupal core - Moderately critical - Improper validation - SA-CORE-2026-009
Medium 5.4
In plain English
A medium-severity cross-site scripting in Drupal core from Drupal. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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 versions: from 0.0.0 to 10.5.12, from 10.6.0 to 10.6.11, from 11.2.0 to 11.2.14, from 11.3.0 to 11.3.12, from 0.0.0 to 11.0.*, from 0.0.0 to 11.1.*.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | drupal/core | 10.5.12, 10.6.11, 11.1.0, 11.2.0, 11.2.14, 11.3.12 | DRUPAL-CORE-2026-009 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Drupal | Drupal core | 0.0.0 – before 10.5.1210.6.0 – before 10.6.1111.2.0 – before 11.2.1411.3.0 – before 11.3.120.0.0 – before 11.0.*0.0.0 – before 11.1.* |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N