CVE-2026-47359
Received Received - Intake

OS Command Injection in Apache CloudStack

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: Apache Software Foundation

Description
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Apache CloudStack's NAS backup provider plugin. The addBackupRepository API (available since 4.20.0.0) and updateBackupRepository API (introduced in 4.22.0.0) accept unsanitized command options for the backup repository. A malicious operator account can exploit this to inject arbitrary commands that execute on the KVM hypervisor host when any account subsequently performs a backup restore. This issue affects Apache CloudStack: from 4.20.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-21
Last Modified
2026-08-21
Generated
2026-08-21
AI Q&A
2026-08-21
EPSS Evaluated
N/A
NVD
CVE-2026-47359
EUVD
EUVD-2026-63848

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
apache cloudstack From 4.20.0.0 (inc) to 4.20.3.0 (inc)
apache cloudstack From 4.21.0.0 (inc) to 4.22.1.0 (inc)
apache cloudstack 4.20.3.1
apache cloudstack 4.22.1.1

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is an OS Command Injection vulnerability in Apache CloudStack's NAS backup provider plugin. The addBackupRepository and updateBackupRepository APIs accept unsanitized command options for backup repositories. A malicious operator account can inject arbitrary commands that execute on the KVM hypervisor host when a backup restore is performed by any account.

Detection Guidance

Detecting this vulnerability requires checking Apache CloudStack versions and API usage. Verify if your system runs versions 4.20.0.0 through 4.20.3.0 or 4.21.0.0 through 4.22.1.0. Inspect logs for suspicious addBackupRepository or updateBackupRepository API calls with unsanitized command options.

Impact Analysis

A malicious operator with access could execute arbitrary commands on the KVM hypervisor host. This could lead to unauthorized access, data theft, or disruption of services running on the hypervisor. The impact depends on the hypervisor's configuration and network access.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate GDPR (data protection) or HIPAA (health data privacy) requirements. Organizations using affected versions must address this to maintain compliance.

Mitigation Strategies

Upgrade Apache CloudStack to version 4.20.3.1, 4.22.1.1, or later immediately. If upgrading is not possible, restrict access to the addBackupRepository and updateBackupRepository APIs for operator accounts until patched.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-47359. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart