Out-of-Bounds Read Vulnerability in onnxruntime by ONNX
CVE-2026-14647

5.3MEDIUM

Key Information:

Vendor

ONNX

Status
Onnx
Vendor
CVE Published:
4 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-14647?

A vulnerability has been detected in onnxruntime, specifically in the convPoolShapeInference_opset19 function within the file onnx/defs/nn/old.cc. This weakness allows for remote exploitation, resulting in out-of-bounds reads that could lead to unauthorized access or manipulation of data. With a public exploit already available, it is crucial for users of onnxruntime versions up to 1.21.x to apply the recommended patch (a7bf3a0f1d18bb62575236ef6e4944980c40e045) to mitigate potential security risks.

Affected Version(s)

onnx 1.0

onnx 1.1

onnx 1.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-14647 - Proof of Concept

References

https://vuldb.com/vuln/376160
vdb-entrytechnical-description
https://vuldb.com/vuln/376160/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-14647
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

m00dy (VulDB User)
.