{"schema":"threatline.record/2","record":{"id":"CVE-2026-115922","aliases":["GHSA-q69g-f4f5-v8m7"],"summary":"ONNX: Denial of service via unchecked expansion of packed sub-byte tensors in ONNX Python APIs","details":"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.","categories":["Unclassified"],"product":"onnx","vendor":"onnx","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115922","source_modified_at":"2026-10-26T17:31:03.716Z","fetched_at":"2026-10-26T19:10:57.178988Z","product":"onnx","vendor":"onnx","versions":[{"version":"< 1.22.0","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":6.2,"severity":"Medium","kev":{"listed":false},"epss":{"probability":null,"percentile":null,"score_date":null},"published_at":"2026-10-26T17:31:03.716Z","modified_at":"2026-10-26T17:31:03.716Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115922","fetched_at":"2026-10-26T19:10:57.178988Z","source_modified_at":"2026-10-26T17:31:03.716Z"}],"sources":["CVE List"],"references":[{"source":"CVE List","url":"https://github.com/onnx/onnx/security/advisories/GHSA-q69g-f4f5-v8m7","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/onnx/onnx/pull/8033","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/onnx/onnx/pull/8038","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/onnx/onnx/pull/8066","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/onnx/onnx/commit/05c1bc3bceceb8d3cf11e9e7fc7f19f971c44988","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/onnx/onnx/commit/8de2cf6aa47928e6515ac6d9e1a8b4758886a7df","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/onnx/onnx/commit/dce5876d6cc6cc30157af7d26a752ef44976da8e","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/onnx/onnx/releases/tag/v1.22.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-26T17:31:03.716Z","content_hash":"aea86eebc9cf4861b290e067780ef5b84aa261813a92652599ccad9ed11ab49f"}}