CVE-2026-27489 — Relative Path Traversal in Onnx

CWE-23 — Relative Path TraversalCWE-61 — UNIX Symbolic Link (Symlink) FollowingCWE-22 — Path Traversal9 documents7 sources
Severity
8.7HIGHNVD
EPSS
0.1%
top 79.12%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
OnnxLinuxfoundation Onnx
Timeline
PublishedApr 1
Latest updateApr 2

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.

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Affected Packages3 packages

▶CVEListV5onnx/onnx< 1.21.0
▶PyPIonnx/onnx< 1.21.0
▶NVDlinuxfoundation/onnx< 1.21.0

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

5
OSV
CVE-2026-27489: (Open Neural Network Exchange (ONNX) is an open standard for machine le↗2026-04-02
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CVEList
ONNX: Path Traversal via Symlink↗2026-04-01
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OSV
CVE-2026-27489: Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability↗2026-04-01
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GHSA
onnx Vulnerable to Path Traversal via Symlink↗2026-03-31
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OSV
onnx Vulnerable to Path Traversal via Symlink↗2026-03-31
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📋Vendor Advisories

2
Red Hat
onnx: ONNX: Information Disclosure via Path Traversal Vulnerability↗2026-04-01
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Debian
CVE-2026-27489: onnx - Open Neural Network Exchange (ONNX) is an open standard for machine learning int...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-27489 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-27489 — Relative Path Traversal in Onnx | cvebase