CVE-2026-61400 Apache CloudStack: Get and Run Diagnostics Command Injection
Authenticated admins can execute arbitrary commands as root on system VMs and virtual routers via diagnostics APIs, enabling full instance compromise.
- 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-2026-61400?
CVE-2026-61400 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 a Command ('Command Injection') vulnerability in Apache CloudStack's run and get diagnostics functionality for the system VMs and virtual routers.
An authenticated user holding the permissions required to invoke either `getDiagnosticsData` or `runDiagnostics` can achieve arbitrary command execution on the system VM and/or Virtual Router instances, with commands running as root (or as the diagnostics-process user, at minimum). This represents a full compromise of the affected instance and, depending on network segmentation, may provide a foothold for lateral movement within the CloudStack-managed infrastructure, including access to guest network traffic handled by the compromised Virtual Router.
The getDiagnosticsData and runDiagnostics APIs are restricted to only Admin role accounts by default.
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-77
Which versions are affected by CVE-2026-61400?
It affects 1 product.
Products include Apache Cloudstack.
How do I fix CVE-2026-61400?
No fix has been published for CVE-2026-61400 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-2026-61400 being exploited?
There is no known exploitation of CVE-2026-61400 in the wild and no public exploit code.
Other vulnerabilities in Apache Cloudstack
- CVE-2012-4501 Missing authorization in n/a
- CVE-2024-38346 Apache CloudStack: Unauthenticated cluster service port leads to remote execution
- CVE-2024-39864 Apache CloudStack: Integration API service uses dynamic port when disabled
- CVE-2024-29006 Apache CloudStack: x-forwarded-for HTTP header parsed by default
- CVE-2022-35741 Apache CloudStack SAML Single Sign-On XXE
Sources
Also known as GHSA-g382-2jw5-f8xr.