CVE-2026-34447

ONNX: External Data Symlink Traversal

State: Published
Severity: 5.5 Medium
Published: Apr 1, 2026
Updated: Apr 1, 2026
Reserved: Mar 27, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-61 UNIX Symbolic Link (Symlink) Following
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
onnxonnx	< 1.21.0Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.