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DRUPAL-CONTRIB-2026-007

Affected: Packagist:https://packages.drupal.org/8: drupal/cas_server

This module enables you to turn a Drupal install into the Central Authentication System (CAS). It makes your database the primary location for other systems to use for authentication in a SSO environment.

The module doesn't sufficiently sanitize user-supplied field values configured to be included as attributes in a CAS server response.

This vulnerability is mitigated by the fact that an attacker must be authenticated, have the ability to enter XML into a user entity field, and that field be configured as a CAS Attribute source leading to an XML Element Injection vulnerability.

EUVD-2026-267473

fkie_cve-2026-1554

XML Injection (aka Blind XPath Injection) vulnerability in Drupal Central Authentication System (CAS) Server allows Privilege Escalation.This issue affects Central Authentication System (CAS) Server: from 0.0.0 before 2.0.3, from 2.1.0 before 2.1.2.

GHSA-rgcm-m74w-vrfx

WID-SEC-W-2026-0250 — Drupal Canvas und CAS: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Drupal ausnutzen, um Sicherheitsvorkehrungen zu umgehen oder Daten zu manipulieren.