CVE-2026-27489
High
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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductLinuxfoundation Onnx
PublishedApr 1, 2026
First seenApr 1, 2026
Weakness typeCWE-23CWE-23CWE-61CWE-61
How to fix
Update
- linuxfoundation onnx1.21.0 or later
- onnx1.21.0 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxfoundation onnx | v < 1.21.0 | 1.21.0 |
| onnxPyPI | v < 1.21.0, v ≤ 1.20.0 | 1.21.0 |
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