UNIX Symbolic Link (Symlink) Following Affecting onnx package, versions [,1.21.0)
Threat Intelligence
This vulnerability is trending on Twitter; this may indicate a growing threat.
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about UNIX Symbolic Link (Symlink) Following vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-PYTHON-ONNX-15870164
- published1 Apr 2026
- disclosed31 Mar 2026
- creditpi3ch
Introduced: 31 Mar 2026
CVE-2026-27489 (opens in a new tab)How to fix?
Upgrade onnx to version 1.21.0 or higher.
Overview
onnx is an Open Neural Network Exchange
Affected versions of this package are vulnerable to UNIX Symbolic Link (Symlink) Following through the handling of external data files when symbolic links are present. An attacker can access arbitrary files on the host system by crafting a symlink that points to sensitive files and providing it alongside a model file to a victim, who then loads the model and inadvertently exposes the targeted files.