{"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"}}}}