RCE in Freecad
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Freecad — versions < 1.1.2
Weakness classification (CWE)
References
- github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v
- github.com/FreeCAD/FreeCAD/commit/81b73925ce22610542367301d8eff4259eb9596e
- github.com/FreeCAD/FreeCAD/commit/983037f3003dc31f48db36705b86fb3fbe026295
- github.com/FreeCAD/FreeCAD/commit/e2dc6c8172673642c6856b8b3a5a6accefb18279
- github.com/FreeCAD/FreeCAD/releases/tag/1.1.2
Frequently asked questions
- What is CVE-2026-34789?
- CVE-2026-34789 is a high-severity vulnerability in Freecad, classified under Code Injection. CVSS score: 7.0/10. Published 2026-08-17.
- How severe is CVE-2026-34789?
- High severity. CVSS v3 base score is 7.0 out of 10.