Drupal Canvas und CAS: Mehrere Schwachstellen
WID-SEC-2026-0250 · first 29.01.2026 · updated 05.02.2026 · CVSS 4,2
What it is about
Drupal ist ein freies Content-Management-System, basierend auf der Scriptsprache PHP und einer SQL-Datenbank. Über zahlreiche Extensions kann der Funktionsumfang der Core-Installation individuell erweitert werden. Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Drupal ausnutzen, um Sicherheitsvorkehrungen zu umgehen oder Daten zu manipulieren.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Sicherheitsvorkehrungen zu umgehen oder Daten zu manipulieren
Am I affected?
Affected according to the BSI:
- Open Source Drupal Canvas <1.0.4
- Open Source Drupal CAS Server <2.0.3
- Open Source Drupal CAS Server <2.1.2
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Drupal Canvas 1.0.4
- Open Source Drupal CAS Server 2.0.3
- Open Source Drupal CAS Server 2.1.2
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Drupal Security Advisory vom 2026-01-28 www.drupal.org
- Drupal Security Advisory vom 2026-01-28 www.drupal.org
CVE: CVE-2026-1553, CVE-2026-1554
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.