CVE-2026-27489

HIGH

ONNX: Path Traversal via Symlink

Title source: cna

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.

References (2)

[X_Refsource_Confirm] https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73

[X_Refsource_Misc] https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb

View Writeup ZIP pw:eip

Scores

CVSS v3 7.5

EPSS 0.0007

EPSS Percentile 20.7%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact partial

Details

CWE

CWE-23 CWE-61

Status published

Products (3)

linuxfoundation/onnx < 1.21.0

onnx/onnx < 1.21.0

pypi/onnx 0 - 1.21.0PyPI

Published Apr 01, 2026

Tracked Since Apr 01, 2026