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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

No data.

No data.

No data.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3r9x-f23j-gc73 onnx Vulnerable to Path Traversal via Symlink
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb cve-icon cve-icon cve-icon
https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-27489 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-27489 cve-icon
History

Thu, 02 Apr 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-22
References
Metrics threat_severity

None

 cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N'}

threat_severity

Important

Wed, 01 Apr 2026 23:45:00 +0000

Type Values Removed Values Added
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.
Title ONNX: Path Traversal via Symlink
Weaknesses CWE-23
CWE-61
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-01T19:09:18.474Z

Reserved: 2026-02-19T19:46:03.541Z

Link: CVE-2026-27489

cve-icon Vulnrichment

Updated: 2026-04-01T19:09:15.456Z

cve-icon NVD

Status : Received

Published: 2026-04-01T18:16:28.287

Modified: 2026-04-01T18:16:28.287

Link: CVE-2026-27489

cve-icon Redhat

Severity : Important

Publid Date: 2026-04-01T17:33:51Z

Links: CVE-2026-27489 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses