{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "onnx",
          "vendor": "onnx",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.22.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to 1.22.0, _unpack_2bit() and _unpack_4bit() resize unpacked arrays according to attacker-controlled TensorProto.dims without verifying that raw_data or int32_data encodes the declared number of elements. Materializing an untrusted UINT2, INT2, UINT4, INT4, or FLOAT4E2M1 tensor through onnx.numpy_helper.to_array() or onnx.reference.ReferenceEvaluator can therefore expand a small packed payload into a disproportionately large allocation and exhaust memory. 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-789",
              "description": "CWE-789: Memory Allocation with Excessive Size Value",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T17:31:03.716Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/onnx/onnx/security/advisories/GHSA-q69g-f4f5-v8m7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/onnx/onnx/security/advisories/GHSA-q69g-f4f5-v8m7"
        },
        {
          "name": "https://github.com/onnx/onnx/pull/8033",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/onnx/onnx/pull/8033"
        },
        {
          "name": "https://github.com/onnx/onnx/pull/8038",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/onnx/onnx/pull/8038"
        },
        {
          "name": "https://github.com/onnx/onnx/pull/8066",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/onnx/onnx/pull/8066"
        },
        {
          "name": "https://github.com/onnx/onnx/commit/05c1bc3bceceb8d3cf11e9e7fc7f19f971c44988",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/onnx/onnx/commit/05c1bc3bceceb8d3cf11e9e7fc7f19f971c44988"
        },
        {
          "name": "https://github.com/onnx/onnx/commit/8de2cf6aa47928e6515ac6d9e1a8b4758886a7df",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/onnx/onnx/commit/8de2cf6aa47928e6515ac6d9e1a8b4758886a7df"
        },
        {
          "name": "https://github.com/onnx/onnx/commit/dce5876d6cc6cc30157af7d26a752ef44976da8e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/onnx/onnx/commit/dce5876d6cc6cc30157af7d26a752ef44976da8e"
        },
        {
          "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-q69g-f4f5-v8m7",
        "discovery": "UNKNOWN"
      },
      "title": "ONNX: Denial of service via unchecked expansion of packed sub-byte tensors in ONNX Python APIs"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-115922",
    "datePublished": "2026-10-26T17:31:03.716Z",
    "dateReserved": "2026-10-23T20:21:45.107Z",
    "dateUpdated": "2026-10-26T17:31:03.716Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}