Bug 2517633 (CVE-2026-34398)

Summary: CVE-2026-34398 FreeCAD: FreeCAD: Arbitrary Code Execution via malicious BIM project template
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FreeCAD, a 3D parametric modeler. The BIM Project Manager's Load Template function does not properly validate certain properties within a project template. This vulnerability allows a remote attacker to embed malicious Python code into a specially crafted BIM project template. When a user opens this malicious template, the embedded code can be executed, potentially leading to arbitrary code execution on the user's system.
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Bug Depends On: 2517705, 2517706    
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Description OSIDB Bzimport 2026-08-17 21:03:09 UTC
FreeCAD is a free and open-source multiplatform 3D parametric modeler. From 0.19 until 1.1.1, src/Mod/BIM/bimcommands/BimProjectManager.py in the BIM Project Manager Load Template flow passes attacker-controlled FCStd Meta property values for wpposition, wpu, wpv, and wpaxis directly to eval(), allowing arbitrary Python code execution when a user loads a malicious BIM project template. This issue is fixed in version 1.1.1.