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CVE-2026-27489

ONNX: Path Traversal via Symlink

Published: Apr 1, 2026Updated: Apr 7, 2026 Sources: CVE List NVDCWE-23
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.5%
Top 59.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-23CWE-61

Affected Products

onnxonnx
Library
AI / ML / ml-framework
onnxlinuxfoundation
Mixed
AI / ML / ml-framework
onnxoss-projectAI / MLaka onnx-mlir
linuxfoundationoss-projectUSAI / MLaka yocto, pytorch, everest

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Discovery
View detailed technique mapping

References

https://github.com/onnx/onnx/security/advisories/GHSA-3r9x-f23j-gc73
github.com
https://github.com/onnx/onnx/commit/4755f8053928dce18a61db8fec71b69c74f786cb
github.com

Timeline

Published
Apr 1, 2026
Last Updated
Apr 7, 2026

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