Bug 2517629 (CVE-2026-34789)

Summary:	CVE-2026-34789 FreeCAD: FreeCAD: Arbitrary code execution via crafted document restoration
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	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.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
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Bug Depends On:	2517709, 2517710
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Description OSIDB Bzimport 2026-08-17 21:03:06 UTC

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.