Kubernetes: Schwachstelle ermöglicht Manipulation von Dateien
WID-SEC-2026-1051 · first 13.04.2026 · updated 13.04.2026 · CVSS 6,5
What it is about
Kubernetes ist ein Werkzeug zur Automatisierung der Bereitstellung, Skalierung und Verwaltung von containerisierten Anwendungen. Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Kubernetes ausnutzen, um Dateien zu manipulieren.
Under what conditions?
Over the network, but only with valid access (login required), for example with stolen credentials or as an insider.
What can happen in the worst case
An attacker could use the vulnerability to
- Dateien zu manipulieren
Am I affected?
Affected according to the BSI:
- Open Source Kubernetes CSI Driver for SMB <1.20.1
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Kubernetes CSI Driver for SMB 1.20.1
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)
- Kubernetes Security Advisory vom 2026-04-12 discuss.kubernetes.io
- GitHub Issue vom 2026-04-12 github.com
CVE: CVE-2026-3865
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.