{"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"}}}}

{}

{"affected": [{"affectedData": [{"product": "onnx", "vendor": "onnx", "versions": [{"status": "affected", "version": "< 1.22.0"}]}], "source": "[email protected]"}], "cveTags": [], "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."}], "id": "CVE-2026-115922", "lastModified": "2026-10-26T18:34:17.050", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.5, "impactScore": 3.6, "source": "[email protected]", "type": "Secondary"}]}, "published": "2026-10-26T18:17:40.163", "references": [{"source": "[email protected]", "url": "https://github.com/onnx/onnx/commit/05c1bc3bceceb8d3cf11e9e7fc7f19f971c44988"}, {"source": "[email protected]", "url": "https://github.com/onnx/onnx/commit/8de2cf6aa47928e6515ac6d9e1a8b4758886a7df"}, {"source": "[email protected]", "url": "https://github.com/onnx/onnx/commit/dce5876d6cc6cc30157af7d26a752ef44976da8e"}, {"source": "[email protected]", "url": "https://github.com/onnx/onnx/pull/8033"}, {"source": "[email protected]", "url": "https://github.com/onnx/onnx/pull/8038"}, {"source": "[email protected]", "url": "https://github.com/onnx/onnx/pull/8066"}, {"source": "[email protected]", "url": "https://github.com/onnx/onnx/releases/tag/v1.22.0"}, {"source": "[email protected]", "url": "https://github.com/onnx/onnx/security/advisories/GHSA-q69g-f4f5-v8m7"}], "sourceIdentifier": "[email protected]", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-789"}], "source": "[email protected]", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.22.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "onnx", "source": "cna", "vendor": "onnx"}, "product": "onnx", "vendor": "onnx"}], "created": "2026-10-26T18:30:14.671886+00:00", "updated": "2026-10-26T19:00:08.306257+00:00", "vendors": ["onnx", "onnx$PRODUCT$onnx"]}