OS Command Injection Vulnerability in Apache CloudStack's NAS Backup Provider Plugin
CVE-2026-47359

8.8HIGH

Key Information:

Vendor

Apache
Status
Apache Cloudstack
Vendor
CVE Published:
21 August 2026

What is CVE-2026-47359?

The Apache CloudStack NAS backup provider plugin contains a vulnerability that allows for OS command injection through unsanitized command options in the addBackupRepository and updateBackupRepository APIs. A malicious operator can exploit this flaw to execute arbitrary commands on the KVM hypervisor host during backup restore operations. It is essential for users to upgrade to version 4.20.3.1 or 4.22.1.1 to address this security risk.

Affected Version(s)

Apache CloudStack 4.20.0.0 <= 4.20.3.0

Apache CloudStack 4.21.0.0 <= 4.22.1.0

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

김우석 <wooseokdotkim@gmail.com>
Łukasz Bawolski <Lukasz.Bawolski@exea.pl>
.