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Vulnerability record · CVE-2026-27489 · published 1 April 2026

CVE-2026-27489: Linuxfoundation onnx relative path traversal vulnerability

Linuxfoundation · Onnx

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, a path traversal vulnerability via symlink allows to read arbitrary files outside model or user-provided directory. This issue has been patched in version 1.21.0.

8.7 CVSS 4.0 High EPSS 0.62% · top 52.6% CWE-23 · Relative path traversalCWE-61 · CWE-61
8.7CVSS 4.0 base score
0.62%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 1 tagged exploit
15 Jul 2026Last modified by NVD

Description

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, a path traversal vulnerability via symlink allows to read arbitrary files outside model or user-provided directory. This issue has been patched in version 1.21.0.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

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

References

LinkTags
https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb Patch
https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73 ExploitMitigationPatchVendor Advisory
https://access.redhat.com/errata/RHSA-2026:24977
https://access.redhat.com/security/cve/CVE-2026-27489
https://bugzilla.redhat.com/show_bug.cgi?id=2453929
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27489.json

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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%8.6CVE-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%6.8CVE-2026-49114Linuxfoundation onnx path traversal vulnerabilityIn ONNX before 1.21.0, the 'save_external_data' function builds the external-data file path from the model's external_data location field and opens i…EPSS 0.16%

Source: NIST National Vulnerability Database (record CVE-2026-27489), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.