CVE-2026-34445

HIGH EPSS 20.4%
Published Apr 1, 20263mo ago · Modified Jun 17, 20262w ago
8.6 CVSS 3.1
High
Find Similar
Published Apr 1, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.6
Exploitability
3.9
Impact
4.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Low
Availability High

Threat Intelligence

EPSS Exploit Probability
20.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 3

CWE-20 Improper Input Validation Validation
CWE-400 Uncontrolled Resource Consumption Resource Mgmt
CWE-915

Affected Products 1

VendorProductVersionRange
linuxfoundationonnx* <1.21.0

References 3

  • github.com https://github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46b
    Patch
  • github.com https://github.com/onnx/onnx/pull/7751
    Issue TrackingPatch
  • github.com https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9
    PatchVendor Advisory

Remediation

  • github.com https://github.com/onnx/onnx/commit/e30c6935d67cc3eca2fa284e37248e7c0036c46b
    Patch
  • github.com https://github.com/onnx/onnx/pull/7751
    Issue TrackingPatch
  • github.com https://github.com/onnx/onnx/security/advisories/GHSA-538c-55jv-c5g9
    PatchVendor Advisory