# CVE-2026-73233: FreeCAD: FEM formula incomplete escape

> Attackers can execute arbitrary Python code by crafting malicious displacement formulas in FreeCAD, requiring user interaction to accept the dialog.

- **Severity:** High 8.5 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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:** 11 Aug 2026
- **Updated:** 11 Aug 2026
- **Also known as:** DEBIAN-CVE-2026-73233, GHSA-2rq3-gx3h-489q, UBUNTU-CVE-2026-73233

## What is CVE-2026-73233?

CVE-2026-73233 is a high-severity code injection vulnerability in FreeCAD, published on 11 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. Prior to 1.1.2, the FEM Displacement Constraint task dialog in src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp passes the xDisplacementFormula, yDisplacementFormula, and zDisplacementFormula fields of a Fem::ConstraintDisplacement object through TaskDlgFemConstraintDisplacement::accept() into Gui::Command::doCommand. The escaping helper neutralizes quotation marks but not backslashes, allowing crafted formula text to terminate the generated Python string and execute arbitrary Python code with the FreeCAD process's privileges when a victim accepts the dialog. This issue is fixed in version 1.1.2.

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

## Which versions are affected by CVE-2026-73233?


## How do I fix CVE-2026-73233?

Upgrade to a fixed version.

## Is CVE-2026-73233 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73233 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73233 and fix it if it is affected.

What it is: CVE-2026-73233 is a high-severity code injection vulnerability in FreeCAD, published on 11 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-2026-73233 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-2026-73233/ (Markdown: https://insights.sbomify.com/CVE-2026-73233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73233
- OSV: https://osv.dev/vulnerability/CVE-2026-73233

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73233/
Summaries are generated and may contain mistakes; the official description above is the record.