Path Traversal in Linuxfoundation Onnx
CVE-2026-34446
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.002 (7.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N.
Affected products
- Linuxfoundation Onnx
- Onnx — versions < 1.21.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-34446?
- CVE-2026-34446 is a medium-severity vulnerability in Linuxfoundation Onnx, classified under Path Traversal. CVSS score: 4.7/10. Published 2026-04-01.
- How severe is CVE-2026-34446?
- Medium severity. CVSS v3 base score is 4.7 out of 10.