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  4. CVE 2026 62440 apache cloudstack improper access control in
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Back to active CVEs
Critical · CVSS 9.1CVE-2026-62440

Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulationCVE-2026-62440

Answer in brief

CVE-2026-62440 records a Critical severity (CVSS 9.1) vulnerability in Apache CloudStack: Improper access control in Kubernetes Service (CKS) cluster manipulation. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache CloudStack (generic), Apache Software Foundation/Apache CloudStack (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 21, 2026Updated Aug 27, 2026Source checked Oct 5, 2026First seen by HOL Aug 21, 2026Material review Aug 27, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.1
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/Apache CloudStack (generic), Apache Software Foundation/Apache CloudStack (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Apache Software Foundation/Apache CloudStackgeneric>=4.21.0.0 <=4.22.1.0Not reported
Apache Software Foundation/Apache CloudStackgeneric4.21.0.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/Apache CloudStack, Apache Software Foundation/Apache CloudStack.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 21, 2026

Sources and claim methodology

  • Source referencelists.apache.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-284
Source
CVE List V5
Source checked
Oct 5, 2026
References
1 linked source
Open source record