PT-2026-29577 · Onnx · Onnx

Published 2026-04-01 · Updated 2026-04-01 · CVE-2026-34445

Mitre

CVSS v3.1

8.6

High

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

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.

Fix

Resource Exhaustion

RCE

Weakness Enumeration

CWE-400

CWE-915

CWE-20

Related Identifiers

CVE-2026-34445

Affected Products

Onnx

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-34445 · Security Note
• https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9 · Note
• https://github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46b · Note
• https://github.com/onnx/onnx/pull/7751 · Note