---
id: CVE-2026-34789
title: FreeCAD is a free and open-source multiplatform 3D parametric modeler
summary: >-
  FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior
  to 1.1.2, src/App/PropertyPythonObject.cpp in PropertyPythonObject::Restore()
  passes the attacker-controlled module attribute from serialized
  PropertyPythonObje…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-94
vendor: FreeCAD
product: FreeCAD
affected:
  - FreeCAD < 1.1.2
published: '2026-08-17'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:11:25.743'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-34789'
references:
  - url: >-
      https://github.com/FreeCAD/FreeCAD/commit/81b73925ce22610542367301d8eff4259eb9596e
    label: security-advisories@github.com
  - url: >-
      https://github.com/FreeCAD/FreeCAD/commit/983037f3003dc31f48db36705b86fb3fbe026295
    label: security-advisories@github.com
  - url: >-
      https://github.com/FreeCAD/FreeCAD/commit/e2dc6c8172673642c6856b8b3a5a6accefb18279
    label: security-advisories@github.com
  - url: 'https://github.com/FreeCAD/FreeCAD/releases/tag/1.1.2'
    label: security-advisories@github.com
  - url: 'https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v'
    label: security-advisories@github.com
  - url: 'https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-08-18T00:00:00+00:00'
ingestedAt: '2026-09-14T08:26:22.850Z'
epss: 0.00188
epssPercentile: 0.07466
---

## Overview

FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, src/App/PropertyPythonObject.cpp in PropertyPythonObject::Restore() passes the attacker-controlled module attribute from serialized PropertyPythonObject XML directly to PyImport_ImportModule() while restoring a crafted FCStd document, which executes module-level Python code, and the legacy pickle branch also imports an attacker-controlled module and invokes its class constructor through PyObject_CallObject(). This issue is fixed in version 1.1.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.