High severity8.6NVD Advisory· Published Apr 1, 2026· Updated Apr 15, 2026
CVE-2026-34445
CVE-2026-34445
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
onnxPyPI | < 1.21.0 | 1.21.0 |
Affected products
10- osv-coords9 versionspkg:apk/chainguard/py3.10-onnxpkg:apk/chainguard/py3.11-onnxpkg:apk/chainguard/py3.12-onnxpkg:apk/chainguard/py3.13-onnxpkg:apk/wolfi/py3.10-onnxpkg:apk/wolfi/py3.11-onnxpkg:apk/wolfi/py3.12-onnxpkg:apk/wolfi/py3.13-onnxpkg:pypi/onnx
< 1.21.0-r0+ 8 more
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0-r0
- (no CPE)range: < 1.21.0
Patches
Vulnerability mechanics
References
5- github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46bnvdPatchWEB
- github.com/onnx/onnx/pull/7751nvdIssue TrackingPatchWEB
- github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9nvdPatchVendor AdvisoryWEB
- github.com/advisories/GHSA-538c-55jv-c5g9ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-34445ghsaADVISORY
News mentions
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