{"id":"PYSEC-2026-104","details":"Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, there is a symlink traversal vulnerability in external data loading allows reading files outside the model directory. This issue has been patched in version 1.21.0.","aliases":["CVE-2026-34447","GHSA-p433-9wv8-28xj"],"modified":"2026-05-20T09:19:09.984613Z","published":"2026-04-01T18:16:30.810Z","references":[{"type":"EVIDENCE","url":"https://github.com/onnx/onnx/security/advisories/GHSA-p433-9wv8-28xj"}],"affected":[{"package":{"name":"onnx","ecosystem":"PyPI","purl":"pkg:pypi/onnx"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.21.0"}]}],"versions":["0.1","0.2","0.2.1","1.0.0","1.0.1","1.1.0","1.1.1","1.1.2","1.10.0","1.10.1","1.10.2","1.11.0","1.12.0","1.13.0","1.13.1","1.14.0","1.14.1","1.15.0","1.16.0","1.16.1","1.16.2","1.17.0","1.18.0","1.19.0","1.19.1","1.19.1rc1","1.2.1","1.2.2","1.2.3","1.20.0","1.20.0rc1","1.20.0rc2","1.20.1","1.20.1rc1","1.21.0rc1","1.21.0rc2","1.21.0rc3","1.21.0rc4","1.3.0","1.4.0","1.4.1","1.5.0","1.6.0","1.7.0","1.8.0","1.8.1","1.9.0"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/onnx/PYSEC-2026-104.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"}]}