What’s Vulnerable › Vulnerabilities
CVE-2026-34447: ONNX: External Data Symlink Traversal
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-04-01 · updated 2026-06-17
- Weakness: CWE-22
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.
Affected products
- onnx: before 1.21.0 — fixed in 1.21.0
How to fix
Upgrade to a fixed version: onnx 1.21.0. Check the vendor advisory for mitigations.
References
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