{"cve":"CVE-2026-34446","nvd":{"published":"2026-04-01T18:16:30.660","modified":"2026-06-17T10:39:03.783","status":"Analyzed","description":"Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, there is an issue in onnx.load, the code checks for symlinks to prevent path traversal, but completely misses hardlinks because a hardlink looks exactly like a regular file on the filesystem. This issue has been patched in version 1.21.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","score":5.5},"cwes":["CWE-22","CWE-61"],"references":["https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb","https://github.com/onnx/onnx/security/advisories/GHSA-cmw6-hcpp-c6jp"],"products":["linuxfoundation:onnx"],"source":"nvd","synced_at":"2026-10-19T22:28:18.033120106+00:00"},"epss":{"cve":"CVE-2026-34446","score":0.00183,"percentile":0.07897,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-cmw6-hcpp-c6jp","url":"https://osv.dev/vulnerability/GHSA-cmw6-hcpp-c6jp","summary":"ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load","modified":"2026-09-10T03:50:43.899271555Z","packages":[{"ecosystem":"PyPI","name":"onnx","purl":"pkg:pypi/onnx","ranges":["<1.21.0"],"fixed":["1.21.0"]}]},{"id":"PYSEC-2026-2241","url":"https://osv.dev/vulnerability/PYSEC-2026-2241","summary":"","modified":"2026-07-13T07:15:50.564237717Z","packages":[{"ecosystem":"PyPI","name":"onnx","purl":"pkg:pypi/onnx","ranges":["<1.21.0"],"fixed":["1.21.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}