Main Vulnerability Database Vulnerabilities #VU139901

Code Injection in Freecad - CVE-2026-34789

Published: July 28, 2026 / Updated: July 28, 2026

Vulnerability identifier: #VU139901

CSH Severity: High

CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-34789

CWE-ID: CWE-94

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in src/App/PropertyPythonObject.cpp. A remote attacker can trick a victim to open a specially crafted FCStd file and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Affected software

Freecad
Debian Linux
freecad (Debian package)

How to mitigate CVE-2026-34789

Install updates from vendor's website.

Freecad - update to 1.1.2
freecad (Debian package) - update to 1.0.0+dfsg-8+deb13u3

Links to Public Exploits and PoC-codes

Exploit #12855 - Arbitrary code execution via unsandboxed PyImport_ImportModule in PropertyPythonObject::Restore (July 28, 2026)

External References

https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v