CVE-2026-47359Network attack vector

KVM host command execution via unsanitized mount options

Published Aug 21, 2026 · Updated Aug 25, 2026

OS command injection in Apache CloudStack's NAS backup plugin allows remote authenticated users to execute arbitrary commands on KVM hosts. The addBackupRepository and updateBackupRepository APIs store unsanitized repository command options that a later restore passes into a mount command. Operator-level access is required to plant the payload, and execution waits until any account restores a backup on a KVM-backed deployment.

CVSS severityUnavailable
Unscored
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Apache CloudStack's NAS backup plugin allows remote authenticated users to execute arbitrary commands on KVM hosts. The addBackupRepository and updateBackupRepository APIs store unsanitized repository command options that a later restore passes into a mount command. Operator-level access is required to plant the payload, and execution waits until any account restores a backup on a KVM-backed deployment.

The record

CVE
CVE-2026-47359
Published
Aug 21, 2026
Updated
Aug 25, 2026
Vendor
The Apache Software Foundation
Product
Apache CloudStack
Classifications
CWE-78, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=4.20.0.0 <=4.20.3.0
  2. 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=4.20.0.0 <=4.20.3.0; version=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-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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

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Your stack

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