{"id":"CVE-2026-63632","title":"Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability","summary":"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/vers…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwe":["CWE-125"],"vendor":"onnx","product":"onnx","affected":["onnx >= 1.3.0, <= 1.21.0"],"patched":["onnx 1.22.0"],"published":"2026-08-18","updated":"2026-09-18","sourceUpdated":"2026-09-18T20:05:53.723","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63632","references":[{"url":"https://github.com/onnx/onnx/commit/e9c74f596eaa0250f89e52a54160a25bbcb25b66","label":"security-advisories@github.com"},{"url":"https://github.com/onnx/onnx/pull/7880","label":"security-advisories@github.com"},{"url":"https://github.com/onnx/onnx/releases/tag/v1.22.0","label":"security-advisories@github.com"},{"url":"https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9","label":"security-advisories@github.com"},{"url":"https://github.com/onnx/onnx/security/advisories/GHSA-p893-rvq9-2xf9","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-p893-rvq9-2xf9"}],"tags":["nvd","ghsa","pip"],"epss":0.00168,"epssPercentile":0.05314,"aliases":["GHSA-p893-rvq9-2xf9"],"ecosystem":"pip","ingestedAt":"2026-07-24T16:33:09.825Z","slug":"CVE-2026-63632","body":"## Overview\n\nOpen 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-63632)\n\nAffected packages:\n\n- `onnx >= 1.3.0, <= 1.21.0`\n\nPatched in:\n\n- `onnx 1.22.0`\n\nSource: https://github.com/advisories/GHSA-p893-rvq9-2xf9","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}