CVE-2026-62440 Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulation
Attackers can manipulate Kubernetes clusters across tenants by adding or removing nodes due to improper access control in the CKS plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-62440?
CVE-2026-62440 is a critical missing authorization vulnerability in Apache Cloudstack, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Access Control vulnerability in Apache CloudStack's Kubernetes Service (CKS) plugin, allowing cross-tenant manipulation of the Kubernetes cluster while adding and removing nodes.
This issue affects Apache CloudStack: from 4.21.0.0 through 4.22.1.0.
Users are recommended to upgrade to version 4.22.1.1 or later, which fixes the issue.
Weakness: CWE-284
Which versions are affected by CVE-2026-62440?
It affects 1 product.
Products include Apache Cloudstack.
How do I fix CVE-2026-62440?
No fix has been published for CVE-2026-62440 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-62440 being exploited?
There is no known exploitation of CVE-2026-62440 in the wild and no public exploit code.
Other vulnerabilities in Apache Cloudstack
- CVE-2012-4501 Missing authorization in n/a
- CVE-2024-38346 Apache CloudStack: Unauthenticated cluster service port leads to remote execution
- CVE-2024-39864 Apache CloudStack: Integration API service uses dynamic port when disabled
- CVE-2024-29006 Apache CloudStack: x-forwarded-for HTTP header parsed by default
- CVE-2022-35741 Apache CloudStack SAML Single Sign-On XXE
Sources
Also known as GHSA-2vq4-5w2v-frrg.