Kubernetes: Mehrere Schwachstellen
WID-SEC-2026-2596 · first 16.09.2021 · updated 31.07.2026 · CVSS 8,1
What it is about
Kubernetes ist ein Werkzeug zur Automatisierung der Bereitstellung, Skalierung und Verwaltung von containerisierten Anwendungen. Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Kubernetes ausnutzen, um Informationen offenzulegen und Sicherheitsmaßnahmen zu umgehen.
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
- Informationen offenzulegen
- Sicherheitsmaßnahmen zu umgehen
Am I affected?
Affected according to the BSI:
- Red Hat Enterprise Linux
- SUSE Linux
- Oracle Linux
- Open Source Kubernetes <1.22.2
- Open Source Kubernetes <1.21.5
- Open Source Kubernetes <1.20.11
- Open Source Kubernetes <1.19.15
- Open Source Kubernetes Kube-Apiserver
- SUSE openSUSE
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 1.22.2
- Open Source Kubernetes 1.21.5
- Open Source Kubernetes 1.20.11
- Open Source Kubernetes 1.19.15
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 2021-09-15 github.com
- Kubernetes Security Advisory vom 2021-09-15 github.com
- Red Hat Security Advisory RHSA-2021:3632 vom 2021-09-27 access.redhat.com
- Red Hat Security Advisory RHSA-2021:3631 vom 2021-09-28 access.redhat.com
- Red Hat Security Advisory RHSA-2021:3635 vom 2021-09-29 access.redhat.com
- Red Hat Security Advisory RHSA-2021:3642 vom 2021-09-29 access.redhat.com
- Red Hat Security Advisory RHSA-2021:3646 vom 2021-09-30 access.redhat.com
- SUSE Security Update SUSE-SU-2021:3323-1 vom 2021-10-08 lists.suse.com
- Oracle Linux Security Advisory ELSA-2021-9526 vom 2021-11-09 linux.oracle.com
- Oracle Linux Security Advisory ELSA-2021-9546 vom 2021-11-09 linux.oracle.com
- openSUSE Security Update OPENSUSE-SU-2026:11389-1 vom 2026-07-30 lists.opensuse.org
- openSUSE Security Update OPENSUSE-SU-2026:11390-1 vom 2026-07-30 lists.opensuse.org
- openSUSE Security Update OPENSUSE-SU-2026:11391-1 vom 2026-07-30 lists.opensuse.org
CVE: CVE-2020-8561, CVE-2021-25741
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.