XML Injection Vulnerability in Drupal Central Authentication System
CVE-2026-1554

4.2MEDIUM

Key Information:

Vendor

Drupal
Status
Central Authentication System (cas) Server
Vendor
CVE Published:
4 February 2026

What is CVE-2026-1554?

An XML Injection vulnerability exists in the Drupal Central Authentication System (CAS) Server that can enable unauthorized privilege escalation. This flaw affects CAS Server versions from 0.0.0 up to but not including 2.0.3, as well as versions from 2.1.0 up to but not including 2.1.2. Attackers can exploit this vulnerability to manipulate XML queries, potentially gaining elevated permissions within the system.

Affected Version(s)

Central Authentication System (CAS) Server 0.0.0 < 2.0.3

Central Authentication System (CAS) Server 2.1.0 < 2.1.2

References

https://www.drupal.org/sa-contrib-2026-007

CVSS V3.1

Score:
4.2
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Gaël Gosset (gaëlg)
Ted Cooper (elc)
Gaël Gosset (gaëlg)
Jaap Jansma (jaapjansma)
Greg Knaddison (greggles)
Juraj Nemec (poker10)
.