# CVE-2026-34398: FreeCAD: Arbitrary Code Execution via eval() on untrusted project file metadata in BIM Workbench

> Attackers can execute arbitrary Python code by tricking users into loading malicious BIM project templates in FreeCAD.

- **Severity:** High 7.8 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 17 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** DEBIAN-CVE-2026-34398, GHSA-8rfj-7956-6gwf, UBUNTU-CVE-2026-34398

## What is CVE-2026-34398?

CVE-2026-34398 is a high-severity code injection vulnerability in FreeCAD, published on 17 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

FreeCAD is a free and open-source multiplatform 3D parametric modeler. From 0.19 until 1.1.1, src/Mod/BIM/bimcommands/BimProjectManager.py in the BIM Project Manager Load Template flow passes attacker-controlled FCStd Meta property values for wpposition, wpu, wpv, and wpaxis directly to eval(), allowing arbitrary Python code execution when a user loads a malicious BIM project template. This issue is fixed in version 1.1.1.

Weakness: CWE-95 (Improper Neutralization of Directives in Dynamically Evaluated Code)

## Which versions are affected by CVE-2026-34398?


## How do I fix CVE-2026-34398?

Upgrade to a fixed version.

## Is CVE-2026-34398 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34398 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34398 and fix it if it is affected.

What it is: CVE-2026-34398 is a high-severity code injection vulnerability in FreeCAD, published on 17 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34398 exists.

Affected product: FreeCAD. 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-2026-34398/ (Markdown: https://insights.sbomify.com/CVE-2026-34398/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34398
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34398
- OSV: https://osv.dev/vulnerability/CVE-2026-34398

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-34398/
Summaries are generated and may contain mistakes; the official description above is the record.