{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "onnx",
          "vendor": "onnx",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.4.0, \u003c 1.22.0"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-195",
              "description": "CWE-195: Signed to Unsigned Conversion Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-476",
              "description": "CWE-476: NULL Pointer Dereference",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T17:28:41.420Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "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"
        }
      ],
      "source": {
        "advisory": "GHSA-m4pr-6v3c-6fgr",
        "discovery": "UNKNOWN"
      },
      "title": "ONNX: Null Pointer Dereference in ScanInferenceFunction Due to Missing Required Attribute"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115921",
    "datePublished": "2026-10-26T17:28:41.420Z",
    "dateReserved": "2026-10-23T20:21:45.107Z",
    "dateUpdated": "2026-10-26T17:28:41.420Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}