CVE-2026-34789
FreeCAD: Arbitrary code execution via unsandboxed PyImport_ImportModule in PropertyPythonObject::Restore
- State
- Published
- Severity
- 7.0 High
- Published
- Aug 17, 2026
- Updated
- Aug 19, 2026
- Reserved
- Mar 30, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.0 High | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-94 Improper Control of Generation of Code ('Code Injection')
Affected Products
| Product | Versions |
|---|---|
FreeCADFreeCAD |
|
References
- https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v
- 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
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