Medium 5.5Published Jul 8, 2026

CVE-2026-44512ONNX: Null Pointer Dereference in Upsample Version Converter Adapter (Zero Inputs)

Updated under an hour ago (Oct 26, 2026, 6:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Open Neural Network Exchange (ONNX) is an open standard for machine learning interoperability. From 1.9.0 before 1.22.0, onnx.version_converter.convert_version() can dereference a null pointer in Upsample_6_7::adapt_upsample_6_7() in onnx/version_converter/adapters/upsample_6_7.h when processing an untrusted model with an Upsample node that has zero inputs, causing an unrecoverable denial of service. This issue is fixed in version 1.22.0.

CVSS: 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

onnx onnx onnx:onnx (from the name)	from 1.9.0, < 1.22.0	CNA record
linuxfoundation onnx linuxfoundation:onnx	from 1.9.0 before 1.22.0	NVD

References

References

https://github.com/onnx/onnx/security/advisories/GHSA-hwpq-hmq9-wj77	x-refsource-confirm, exploit, vendor-advisory
https://github.com/onnx/onnx/pull/7813	x-refsource-misc, issue-tracking, patch
https://github.com/onnx/onnx/commit/cd310408165ad47c3cd7eb2b86cb5b80aa2e4fdf	x-refsource-misc, patch
https://github.com/onnx/onnx/releases/tag/v1.22.0	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.