CVE-2026-34445

8.6 HIGH
Published: April 01, 2026 Modified: April 15, 2026
View on NVD

Description

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. Prior to version 1.21.0, the ExternalDataInfo class in ONNX was using Pythonโ€™s setattr() function to load metadata (like file paths or data lengths) directly from an ONNX model file. It didnโ€™t check if the "keys" in the file were valid. Due to this, an attacker could craft a malicious model that overwrites internal object properties. This issue has been patched in version 1.21.0.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/onnx/onnx/pull/7751
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9
Source: security-advisories@github.com
Patch Vendor Advisory

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.6 / 10.0
EPSS (Exploit Probability)
0.1%
34th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

linuxfoundation