Improper Access Control Vulnerability in Apache CloudStack Kubernetes Service Plugin
CVE-2026-62440

9.1CRITICAL

Key Information:

Vendor

Apache
Status
Apache Cloudstack
Vendor
CVE Published:
21 August 2026

What is CVE-2026-62440?

An improper access control vulnerability exists in Apache CloudStack's Kubernetes Service (CKS) plugin, which enables unauthorized cross-tenant manipulation of the Kubernetes cluster during node management activities such as adding or removing nodes. This vulnerability affects users of Apache CloudStack versions up to 4.22.1.0. It is recommended that users upgrade to version 4.22.1.1 or later to mitigate this issue and enhance security.

Affected Version(s)

Apache CloudStack 4.21.0.0 <= 4.22.1.0

References

https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3f...
vendor-advisory

CVSS V3.1

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen (GitHub: geo-chen)
D0HY30N (GitHub: D0HY30N)
.