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Vulnerability record · CVE-2026-34447 · published 1 April 2026

CVE-2026-34447: Linuxfoundation onnx path traversal vulnerability

Linuxfoundation · Onnx

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.

5.5 CVSS 3.1 Medium EPSS 0.19% · top 92.2% CWE-22 · Path traversalCWE-61 · CWE-61
5.5CVSS 3.1 base score
0.19%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/onnx/onnx/security/advisories/GHSA-p433-9wv8-28xj ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.1CVE-2026-28500Linuxfoundation onnx insufficient verification of data authenticity vulnerabilityOpen Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. In versions up to and including 1.20.1, a security con…EPSS 0.31%9.1CVE-2024-27319Linuxfoundation onnx out-of-bounds read vulnerabilityVersions of the package onnx before and including 1.15.0 are vulnerable to Out-of-bounds Read as the ONNX_ASSERT and ONNX_ASSERTM functions have an o…EPSS 0.59%8.8CVE-2025-51480Linuxfoundation onnx path traversal vulnerabilityPath Traversal vulnerability in onnx.external_data_helper.save_external_data in ONNX 1.17.0 allows attackers to overwrite arbitrary files by supplyin…EPSS 0.60%8.8CVE-2024-5187Linuxfoundation onnx path traversal vulnerabilityA vulnerability in the `download_model_with_test_data` function of the onnx/onnx framework, version 1.16.0, allows for arbitrary file overwrite due t…EPSS 1.2%8.7CVE-2026-27489Linuxfoundation onnx relative path traversal vulnerabilityOpen Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, a path traversal vulnerabilit…EPSS 0.62%8.6CVE-2026-34445Linuxfoundation onnx improper input validation vulnerabilityOpen Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, the ExternalDataInfo class in…EPSS 0.51%7.5CVE-2024-27318Linuxfoundation onnx path traversal vulnerabilityVersions of the package onnx before and including 1.15.0 are vulnerable to Directory Traversal as the external_data field of the tensor proto can hav…EPSS 1.2%7.5CVE-2022-25882Linuxfoundation onnx path traversal vulnerabilityVersions of the package onnx before 1.13.0 are vulnerable to Directory Traversal as the external_data field of the tensor proto can have a path to th…EPSS 1.6%

Source: NIST National Vulnerability Database (record CVE-2026-34447), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.