CVE-2026-47359 Apache CloudStack: OS Command Injection due to unsanitized mount command

High 8.8 Published 21 Aug 2026 Updated 26 Aug 2026

A malicious operator can inject arbitrary commands into the backup repository configuration, leading to code execution on the KVM hypervisor host.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-47359?

CVE-2026-47359 is a high-severity command injection vulnerability in Apache Cloudstack, published on 21 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-78

Which versions are affected by CVE-2026-47359?

It affects 1 product.

Products include Apache Cloudstack.

How do I fix CVE-2026-47359?

No fix has been published for CVE-2026-47359 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2026-47359 being exploited?

There is no known exploitation of CVE-2026-47359 in the wild and no public exploit code.

All Apache Cloudstack vulnerabilities

Sources

Also known as GHSA-q442-8588-4c7j.