CVE-2026-34446
ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load
4.7
MEDIUM
CVSS 3.1
EPSS 0.00%
Description
Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, there is an issue in onnx.load, the code checks for symlinks to prevent path traversal, but completely misses hardlinks because a hardlink looks exactly like a regular file on the filesystem. This issue has been patched in version 1.21.0.
How to fix CVE-2026-34446
To remediate CVE-2026-34446, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 1.21.0 or later
Is CVE-2026-34446 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0
- from 0, < 1.21.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.7 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N |