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Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

CVE-2026-73233FreeCAD: FEM formula incomplete escape

High 8.5

In plain English

A high-severity code injection in FreeCAD from FreeCAD. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.5High
Exploit odds (30 days)0.2%top 90.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, the FEM Displacement Constraint task dialog in src/Mod/Fem/Gui/TaskFemConstraintDisplacement.cpp passes the xDisplacementFormula, yDisplacementFormula, and zDisplacementFormula fields of a Fem::ConstraintDisplacement object through TaskDlgFemConstraintDisplacement::accept() into Gui::Command::doCommand. The escaping helper neutralizes quotation marks but not backslashes, allowing crafted formula text to terminate the generated Python string and execute arbitrary Python code with the FreeCAD process's privileges when a victim accepts the dialog. This issue is fixed in version 1.1.2.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13freecad1.0.0+dfsg-8+deb13u3DEBIAN-CVE-2026-73233
Debian:14freecad1.1.3+dfsg-1DEBIAN-CVE-2026-73233
Ubuntu:22.04:LTSfreecadno fix listedUBUNTU-CVE-2026-73233
Ubuntu:26.10freecadno fix listedUBUNTU-CVE-2026-73233

Affected products (as reported)

VendorProductVersions
FreeCAD FreeCAD < 1.1.2

Weakness: CWE-94 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References