Threat landscape
critical exploited

Drupal Core: Mehrere Schwachstellen

WID-SEC-2026-2002 · first 18.06.2026 · updated 13.07.2026 · CVSS 9,8

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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 Angreifer kann mehrere Schwachstellen in Drupal Core ausnutzen, um beliebigen Programmcode auszuführen, Cross-Site-Scripting-Angriffe durchzuführen, um Daten zu manipulieren, oder um Nutzer auf bösartige Websites umzuleiten.

Under what conditions?

The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.

What can happen in the worst case

An attacker could use the vulnerability to

  • beliebigen Programmcode auszuführen
  • Cross-Site-Scripting-Angriffe durchzuführen
  • Daten zu manipulieren
  • oder um Nutzer auf bösartige Websites umzuleiten

Am I affected?

Affected according to the BSI:

  • Open Source Drupal Core <8.5.11
  • Open Source Drupal Core <8.6.10
  • Open Source Drupal Core <11.3.12
  • Open Source Drupal Core <11.2.14
  • Open Source Drupal Core <10.6.11
  • Open Source Drupal Core <10.5.12

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 Core 8.5.11
  • Open Source Drupal Core 8.6.10
  • Open Source Drupal Core 11.3.12
  • Open Source Drupal Core 11.2.14
  • Open Source Drupal Core 10.6.11
  • Open Source Drupal Core 10.5.12

Is the vulnerability already being exploited?

  • CVE-2019-6340: exploited in the wild according to CISA, in the catalogue since 25.03.2022.

Information and sources

CVE: CVE-2026-55803, CVE-2026-55804, CVE-2026-55806, CVE-2026-55807, CVE-2026-55808, CVE-2019-6340

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.

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