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TI-2026-27033 Aliases CVE-2026-34789

FreeCAD: Arbitrary code execution via unsandboxed PyImport_ImportModule in PropertyPythonObject::Restore

Priority HIGH 66CWE-94Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00196 9th percentileScored 2026-11-07
Fix Fixed FreeCAD (FreeCAD): 1.1.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FreeCADFreeCADbefore 1.1.21.1.2Patch availableCNA
  • FreeCAD VendorFreeCAD Affected before 1.1.2 Fixed in 1.1.2 Patch available CNA

Remediation

  • Fix · CNA FreeCAD (FreeCAD) Fixed in 1.1.2

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34789

References

Other 5

  • TI-2026-51370 FreeCAD: FEM formula incomplete escape CVSS 4.0HIGH 8.5
  • TI-2026-51371 Path traversal in FreeCAD CVSS 3.1HIGH 7.8
  • TI-2026-26684 FreeCAD: Arbitrary Code Execution via eval() on untrusted project file metadata in BIM Workbench CVSS 3.1HIGH 7.8
  • TI-2026-26685 FreeCAD: Arbitrary Code Execution via eval() on untrusted SVG template scale field in BIM TechDraw Page CVSS 3.1HIGH 7.8
  • TI-2026-51372 FreeCAD: XXE file read and SSRF via external entity injection in Document.xml SAX parser CVSS 3.1MEDIUM 6.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences