CVE-2026-34445

Fixed in a distro release EPSS <1%CVSS 8.6

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.

Published 2026-04-01 · CVE record · OSV

Products: onnx

Fixed upstream

Distro releases