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Vulnerability record · CVE-2026-34789 · published 17 August 2026

CVE-2026-34789: Code injection vulnerability

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.

7.0 CVSS 3.1 High EPSS 0.19% · top 92.5% CWE-94 · Code injection Awaiting Analysis
7.0CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
6References
9 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References

LinkTags
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
https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v

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Source: NIST National Vulnerability Database (record CVE-2026-34789), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.