CVE-2026-34789
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.
CSIRTS triage
- What
- FreeCAD contains multiple vulnerabilities allowing arbitrary code execution, local file disclosure, and requests to arbitrary hosts when processing crafted FCStd documents or templates.
- Who is affected
- Systems running FreeCAD and processing untrusted FCStd documents or templates are affected.
- Urgency
- High urgency; arbitrary code execution and file disclosure are possible from crafted documents.
- Action
- Apply Debian security update DSA-6467-1 for FreeCAD.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all EPSS-scored CVEs.
Advisory coverage (2)
- unknownDSA-6467-1 freecad - security updatedebian · 2026-08-26
- highCVE-2026-34789: FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, src/App…nvd · 2026-08-17
External references
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