CVE-2026-34445— ONNX: Malicious ONNX models can crash servers by exploiting unprotected object settings.
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I. Basic Information for CVE-2026-34445
Vulnerability Information
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Vulnerability Title
ONNX: Malicious ONNX models can crash servers by exploiting unprotected object settings.
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Open Neural Network Exchange 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open Neural Network Exchange是Open Neural Network Exchange开源的一个开放的生态系统，它使 AI 开发人员能够随着项目的发展选择合适的工具。 Open Neural Network Exchange 1.21.0之前版本存在安全漏洞，该漏洞源于ONNX中的ExternalDataInfo类使用Python的setattr()函数从ONNX模型文件直接加载元数据，但未检查文件中的键是否有效，可能导致攻击者通过特制恶意模型覆盖内部对象属性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-34445
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7622 chars
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III. Intelligence Information for CVE-2026-34445
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Same Patch Batch · onnx · 2026-04-01 · 4 CVEs total
| CVE-2026-34447 | 5.5 MEDIUM | ONNX: External Data Symlink Traversal |
| CVE-2026-34446 | 4.7 MEDIUM | ONNX: Arbitrary File Read via ExternalData Hardlink Bypass in ONNX load |
| CVE-2026-27489 | ONNX: Path Traversal via Symlink |
IV. Related Vulnerabilities
V. Comments for CVE-2026-34445
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