{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-115922",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-23T20:21:45.107Z",
        "datePublished": "2026-10-26T17:31:03.716Z",
        "dateUpdated": "2026-10-26T17:31:03.716Z"
    },
    "containers": {
        "cna": {
            "title": "ONNX: Denial of service via unchecked expansion of packed sub-byte tensors in ONNX Python APIs",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-789",
                            "lang": "en",
                            "description": "CWE-789: Memory Allocation with Excessive Size Value",
                            "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-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"
                }
            ],
            "affected": [
                {
                    "vendor": "onnx",
                    "product": "onnx",
                    "versions": [
                        {
                            "version": "< 1.22.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-26T17:31:03.716Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-q69g-f4f5-v8m7",
                "discovery": "UNKNOWN"
            }
        }
    }
}