# CVE-2026-27635: Manyfold vulnerable to OS command injection via ZIP filename in f3d render

> A logged-in user can achieve remote code execution by uploading a ZIP file with shell metacharacters in the filename when render generation is enabled.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/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:** 25 Feb 2026
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-p589-cf26-v7h2

## What is CVE-2026-27635?

CVE-2026-27635 is a high-severity command injection vulnerability in manyfold3d manyfold, published on 25 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Manyfold is an open source, self-hosted web application for managing a collection of 3d models, particularly focused on 3d printing. Prior to version 0.133.0, when model render generation is enabled, a logged-in user can achieve RCE by uploading a ZIP containing a file with a shell metacharacter in its name. The filename reaches a Ruby backtick call unsanitized. Version 0.133.0 fixes the issue.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2026-27635?

It affects 1 product.


Products: Manyfold Manyfold.

## How do I fix CVE-2026-27635?

No fix has been published for CVE-2026-27635 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-27635 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27635 exists.

## Other vulnerabilities in manyfold3d manyfold

- [CVE-2026-27933](https://insights.sbomify.com/CVE-2026-27933/): Manyfold vulnerable to session hijack via cookie leakage in proxy caches (medium 6.8)
- [CVE-2026-28225](https://insights.sbomify.com/CVE-2026-28225/): Manyfold has IDOR in ModelFilesController (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-27635 and fix it if it is affected.

What it is: CVE-2026-27635 is a high-severity command injection vulnerability in manyfold3d manyfold, published on 25 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27635 exists.

Affected product: manyfold3d manyfold. 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-2026-27635/ (Markdown: https://insights.sbomify.com/CVE-2026-27635/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-27635
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-27635
- OSV: https://osv.dev/vulnerability/CVE-2026-27635

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-27635/
Summaries are generated and may contain mistakes; the official description above is the record.