CVE-2026-62440Network attack vector

Cross-tenant node manipulation via CKS authorization failure

Published Aug 21, 2026 · Updated Aug 21, 2026

Improper access control in Apache CloudStack 4.21.0.0 through 4.22.1.0 allows remote authenticated users to alter another tenant's CKS nodes. The CKS plugin accepts node-addition and node-removal operations across tenant boundaries; Apache has not disclosed the affected API handler or failed authorization check. Exploitation requires an authenticated account and an enabled CKS plugin, and it can change cluster configuration or interrupt another tenant's Kubernetes capacity.

CVSS severityUnavailable
Unscored
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper access control in Apache CloudStack 4.21.0.0 through 4.22.1.0 allows remote authenticated users to alter another tenant's CKS nodes. The CKS plugin accepts node-addition and node-removal operations across tenant boundaries; Apache has not disclosed the affected API handler or failed authorization check. Exploitation requires an authenticated account and an enabled CKS plugin, and it can change cluster configuration or interrupt another tenant's Kubernetes capacity.

The record

CVE
CVE-2026-62440
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
The Apache Software Foundation
Product
Apache CloudStack
Classifications
CWE-284, T1578
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.21.0.0 <=4.22.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache CloudStackversion=4.21.0.0 <=4.22.1.0

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1578Modify Cloud Compute Infrastructure

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo