CVE-2026-34445

Published Apr 1, 2026

Last updated 16 days ago

Overview

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 Python’s setattr() function to load metadata (like file paths or data lengths) directly from an ONNX model file. It didn’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.
Source
security-advisories@github.com
NVD status
Analyzed
Products
onnx

Risk scores

CVSS 3.1

Type
Secondary
Base score
8.6
Impact score
4.7
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Severity
HIGH

Weaknesses

security-advisories@github.com
CWE-20

Social media

Hype score
Not currently trending

Configurations