{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-115921",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-23T20:21:45.107Z",
        "datePublished": "2026-10-26T17:28:41.420Z",
        "dateUpdated": "2026-10-26T17:28:41.420Z"
    },
    "containers": {
        "cna": {
            "title": "ONNX: Null Pointer Dereference in ScanInferenceFunction Due to Missing Required Attribute",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-195",
                            "lang": "en",
                            "description": "CWE-195: Signed to Unsigned Conversion Error",
                            "type": "CWE"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-476",
                            "lang": "en",
                            "description": "CWE-476: NULL Pointer Dereference",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.2,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/onnx/onnx/security/advisories/GHSA-m4pr-6v3c-6fgr",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/onnx/onnx/security/advisories/GHSA-m4pr-6v3c-6fgr"
                },
                {
                    "name": "https://github.com/onnx/onnx/pull/7916",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onnx/onnx/pull/7916"
                },
                {
                    "name": "https://github.com/onnx/onnx/commit/dd6bc92ea39fd2274fd671f0734b0b8b558356f5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onnx/onnx/commit/dd6bc92ea39fd2274fd671f0734b0b8b558356f5"
                },
                {
                    "name": "https://github.com/onnx/onnx/releases/tag/v1.22.0",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onnx/onnx/releases/tag/v1.22.0"
                }
            ],
            "affected": [
                {
                    "vendor": "onnx",
                    "product": "onnx",
                    "versions": [
                        {
                            "version": ">= 1.4.0, < 1.22.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-26T17:28:41.420Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.4.0 until 1.22.0, ScanInferenceFunction, ScanInferenceFunction_opset8, and ScanInferenceFunction_opset9 do not safely validate the required num_scan_inputs attribute. A missing attribute is dereferenced as a null pointer, while a negative value is converted to size_t and can reach an exceptional oversized allocation path. An untrusted model can therefore terminate or disrupt shape inference, including a negative-value model that can pass onnx.checker.check_model(). This issue is fixed in version 1.22.0."
                }
            ],
            "source": {
                "advisory": "GHSA-m4pr-6v3c-6fgr",
                "discovery": "UNKNOWN"
            }
        }
    }
}