Path Traversal Vulnerability in Open Neural Network Exchange by ONNX
CVE-2026-27489

8.7HIGH

Key Information:

Vendor

Onnx

Status
Onnx
Vendor
CVE Published:
1 April 2026

What is CVE-2026-27489?

A path traversal vulnerability exists in Open Neural Network Exchange (ONNX) that allows attackers to exploit symlink functionality. This issue enables unauthorized access to arbitrary files outside of the designated model or user-specified directory. The vulnerability has been addressed in version 1.21.0, hence users are encouraged to upgrade to mitigate the risk of sensitive data exposure.

Affected Version(s)

onnx < 1.21.0

References

https://github.com/onnx/onnx/security/advisories/GHSA-3r9...
x_refsource_CONFIRM
https://github.com/onnx/onnx/commit/4755f8053928dce18a61d...
x_refsource_MISC

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.