Drupal Core XSS Vulnerability Unpatched before 10.5.12,10.6.11,11.2.14,11.3.12
CVE-2026-55808 Published on July 10, 2026
Drupal core - Moderately critical - Improper validation - SA-CORE-2026-009
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.*.
Vulnerability Analysis
CVE-2026-55808 is exploitable with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-55808 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-55808
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Affected Versions
Drupal core:- Version 0.0.0 and below 10.5.12 is affected.
- Version 10.6.0 and below 10.6.11 is affected.
- Version 11.2.0 and below 11.2.14 is affected.
- Version 11.3.0 and below 11.3.12 is affected.
- Version 0.0.0 and below 11.0.* is affected.
- Version 0.0.0 and below 11.1.* is affected.