CVE-2026-34789

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{"affected": [{"affectedData": [{"product": "FreeCAD", "vendor": "FreeCAD", "versions": [{"status": "affected", "version": "< 1.1.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-34789", "lastModified": "2026-09-09T21:11:25.743", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34789", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-18T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-08-17T21:16:44.403", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/FreeCAD/FreeCAD/commit/81b73925ce22610542367301d8eff4259eb9596e"}, {"source": "security-advisories@github.com", "url": "https://github.com/FreeCAD/FreeCAD/commit/983037f3003dc31f48db36705b86fb3fbe026295"}, {"source": "security-advisories@github.com", "url": "https://github.com/FreeCAD/FreeCAD/commit/e2dc6c8172673642c6856b8b3a5a6accefb18279"}, {"source": "security-advisories@github.com", "url": "https://github.com/FreeCAD/FreeCAD/releases/tag/1.1.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-94"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "FreeCAD: FreeCAD: Arbitrary code execution via crafted document restoration", "id": "2517629", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517629"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-502", "details": ["A flaw was found in FreeCAD, a 3D parametric modeler. A remote attacker could exploit this vulnerability by tricking a user into opening a specially crafted FCStd document. When the document is restored, attacker-controlled module attributes are processed, leading to the execution of arbitrary Python code. This could result in a complete system compromise."], "name": "CVE-2026-34789", "public_date": "2026-08-17T20:47:52Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34789\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34789\nhttps://github.com/FreeCAD/FreeCAD/commit/81b73925ce22610542367301d8eff4259eb9596e\nhttps://github.com/FreeCAD/FreeCAD/commit/983037f3003dc31f48db36705b86fb3fbe026295\nhttps://github.com/FreeCAD/FreeCAD/commit/e2dc6c8172673642c6856b8b3a5a6accefb18279\nhttps://github.com/FreeCAD/FreeCAD/releases/tag/1.1.2\nhttps://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v"], "statement": "This Important vulnerability in FreeCAD allows for arbitrary code execution when a user opens a specially crafted FCStd document. While user interaction is required, the low attack complexity and potential for complete system compromise elevate the risk, making it more severe than a Moderate flaw.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.1.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "FreeCAD", "source": "cna", "vendor": "FreeCAD"}, "product": "freecad", "vendor": "freecad"}], "created": "2026-08-17T22:45:04.421053+00:00", "updated": "2026-08-18T15:00:06.105901+00:00", "vendors": ["freecad", "freecad$PRODUCT$freecad"]}