CVE-2026-34445
Python vulnerability analysis and mitigation

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.


SourceNVD

Related Python vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

GHSA-cjcx-jfp2-f7m2HIGH8.7
  • PythonPython
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NoYesApr 18, 2026
CVE-2026-41241HIGH8.7
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CVE-2026-40491MEDIUM6.5
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GHSA-jm8c-9f3j-4378MEDIUM6.1
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CVE-2026-41426MEDIUM6.1
  • PythonPython
  • pretalx
NoYesApr 18, 2026

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