Copyright © 2012 Red Hat, Inc. All rights reserved. Important 2026-08-17T20:47:52 FreeCAD: FreeCAD: Arbitrary code execution via crafted document restoration 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CWE-502

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.

A flaw was found in FreeCAD, a 3D parametric modeler. A remote attacker could exploit this vulnerability by tricking a user into opening a specially crafted FCStd document. When the document is restored, attacker-controlled module attributes are processed, leading to the execution of arbitrary Python code. This could result in a complete system compromise.

This Important vulnerability in FreeCAD allows for arbitrary code execution when a user opens a specially crafted FCStd document. While user interaction is required, the low attack complexity and potential for complete system compromise elevate the risk, making it more severe than a Moderate flaw. https://www.cve.org/CVERecord?id=CVE-2026-34789 https://nvd.nist.gov/vuln/detail/CVE-2026-34789 https://github.com/FreeCAD/FreeCAD/commit/81b73925ce22610542367301d8eff4259eb9596e https://github.com/FreeCAD/FreeCAD/commit/983037f3003dc31f48db36705b86fb3fbe026295 https://github.com/FreeCAD/FreeCAD/commit/e2dc6c8172673642c6856b8b3a5a6accefb18279 https://github.com/FreeCAD/FreeCAD/releases/tag/1.1.2 https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v