ONNX: Malicious ONNX models can crash servers by exploiting unprotected object settings._CVE-2026-34445

{
    "lastseen": "",
    "description": "Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, the ExternalDataInfo class in ONNX was using Python\u2019s setattr() function to load metadata (like file paths or data lengths) directly from an ONNX model file. It didn\u2019t check if the \"keys\" in the file were valid. Due to this, an attacker could craft a malicious model that overwrites internal object properties. This issue has been patched in version 1.21.0.",
    "published": "2026-04-01T17:30:19.994Z",
    "modified": "2026-04-01T18:00:14.120Z",
    "type": "cve",
    "title": "ONNX: Malicious ONNX models can crash servers by exploiting unprotected object settings.",
    "source": "GitHub_M",
    "references": "https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9\nhttps://github.com/onnx/onnx/pull/7751\nhttps://github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46b",
    "id": "CVE-2026-34445",
    "bulletinFamily": "",
    "cwe": [
        "CWE-20",
        "CWE-400",
        "CWE-915"
    ],
    "cvelist": null,
    "sourceData": "onnx onnx < 1.21.0",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
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        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
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            "privilegesRequired": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "onnx",
    "version": "< 1.21.0",
    "vendor": "onnx",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}