PatchTheCVECVE-2026-34445: Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability
CVE-2026-34445 is a high-severity flaw (CVSS 8.6) affecting onnx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- High severity
- Remotely exploitable, no login, no user action
- On your watchlist
A fixed release or distro patch exists.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-34445?
onnx: upgrade to 1.21.0. Exact commands for each OS are on this page.
Is CVE-2026-34445 being exploited?
CVE-2026-34445 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-34445 affect?
CVE-2026-34445 affects onnx. Severity is high (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 lengt
How urgent is CVE-2026-34445?
Priority 45/100. High severity; Remotely exploitable, no login, no user action; On your watchlist
Software pages
Related CVEs
- CVE-2026-49114 HIGH 7.1 UPGRADE In ONNX before 1.21.0, the 'save_external_data' function builds the external-data file path from the model's e
- CVE-2026-28500 HIGH 8.6 UPGRADE Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability
- CVE-2026-27489 HIGH 7.5 UPGRADE Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability
- CVE-2026-44512 MEDIUM 5.5 UPGRADE Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability
- CVE-2026-34447 MEDIUM 5.5 UPGRADE Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability