SB2026012904 - XML injection in Central Authentication System (CAS) Server module for Drupal
Published: January 29, 2026
Security Bulletin ID
SB2026012904
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) XML injection (CVE-ID: CVE-2026-1554)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the affected module does not sufficiently sanitize user-supplied field values configured to be included as attributes in a CAS server response. A remote user can pass specially crafted XML data to the application and cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.