{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-63632",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-07-17T14:11:15.482Z",
        "datePublished": "2026-08-18T14:55:15.923Z",
        "dateUpdated": "2026-08-18T18:51:29.068Z"
    },
    "containers": {
        "cna": {
            "title": "ONNX: Heap-Buffer-Overflow READ in Gemm Version Converter Adapter via Undersized Input Shape",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-125",
                            "lang": "en",
                            "description": "CWE-125: Out-of-bounds Read",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "LOW",
                        "baseScore": 3.3,
                        "baseSeverity": "LOW",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9"
                },
                {
                    "name": "https://github.com/onnx/onnx/pull/7880",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onnx/onnx/pull/7880"
                },
                {
                    "name": "https://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66"
                },
                {
                    "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": ">= 1.3.0, < 1.22.0",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-08-18T14:55:15.923Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.3.0 until 1.22.0, onnx.version_converter.convert_version() can perform an out-of-bounds read in Gemm_7_6::adapt_gemm_7_6() in onnx/version_converter/adapters/gemm_7_6.h when a Gemm node has input tensors with fewer than two dimensions because B_shape[1], A_shape[0], or A_shape[1] is accessed without a rank check, potentially causing a process crash during an opset 7 to 6 downgrade. This issue is fixed in version 1.22.0."
                }
            ],
            "source": {
                "advisory": "GHSA-p893-rvq9-2xf9",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-18T18:51:22.894530Z",
                                "id": "CVE-2026-63632",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-18T18:51:29.068Z"
                }
            }
        ]
    }
}