# CVE-2026-25077: Apache CloudStack: Unauthenticated Command Injection in Direct Download Templates

> Attackers can execute arbitrary code on KVM hosts by registering malicious templates due to missing filename sanitization in Apache CloudStack.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 May 2026
- **Updated:** 10 May 2026
- **Also known as:** GHSA-vhgc-6rjx-f6vv

## What is CVE-2026-25077?

CVE-2026-25077 is a high-severity command injection vulnerability in Apache Cloudstack, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Account users are allowed by default to register templates to be downloaded directly to the primary storage for deploying instances using the KVM hypervisor. Due to missing file name sanitization, an attacker can register malicious templates to execute arbitrary code on the KVM hosts. This can result in the compromise of resource integrity and confidentiality, data loss, denial of service, and availability of the KVM-based infrastructure managed by CloudStack.

Users are recommended to upgrade to Apache CloudStack versions 4.20.3.0 or 4.22.0.1, or later, which fixes this issue.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-25077?

It affects 1 product.


Products: Apache Cloudstack.

## How do I fix CVE-2026-25077?

No fix has been published for CVE-2026-25077 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25077 being exploited?

There is no known exploitation of CVE-2026-25077 in the wild and no public exploit code.

## Other vulnerabilities in Apache Cloudstack

- [CVE-2012-4501](https://insights.sbomify.com/CVE-2012-4501/): Missing authorization in n/a (critical 10.0)
- [CVE-2024-38346](https://insights.sbomify.com/CVE-2024-38346/): Apache CloudStack: Unauthenticated cluster service port leads to remote execution (critical 9.8)
- [CVE-2024-39864](https://insights.sbomify.com/CVE-2024-39864/): Apache CloudStack: Integration API service uses dynamic port when disabled (critical 9.8)
- [CVE-2024-29006](https://insights.sbomify.com/CVE-2024-29006/): Apache CloudStack: x-forwarded-for HTTP header parsed by default (critical 9.8)
- [CVE-2022-35741](https://insights.sbomify.com/CVE-2022-35741/): Apache CloudStack SAML Single Sign-On XXE (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25077 and fix it if it is affected.

What it is: CVE-2026-25077 is a high-severity command injection vulnerability in Apache Cloudstack, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-25077 in the wild and no public exploit code.

Affected product: Apache Cloudstack. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-25077/ (Markdown: https://insights.sbomify.com/CVE-2026-25077/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25077
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25077
- OSV: https://osv.dev/vulnerability/CVE-2026-25077

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-25077/
Summaries are generated and may contain mistakes; the official description above is the record.