CVE-2026-62440: Apache Cloudstack

Critical severity, CVSS 9.1. EPSS: 0.5% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Cloudstack: from 4.21.0.0, before 4.22.1.1 (fixed in 4.22.1.1)

Published 2026-08-21. Last modified 2026-08-27.