---
id: CVE-2026-111991
title: >-
  WongKinYiu yolov9 ONNX Metadata common.py DetectMultiBackend.__init__ code
  injection
summary: >-
  A security vulnerability has been detected in WongKinYiu yolov9 0.1. This
  vulnerability affects the function DetectMultiBackend.__init__ of the file
  models/common.py of the component ONNX Metadata Handler. The manipulation of
  the argumen…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C'
cvssSource: cna
cwe:
  - CWE-94
  - CWE-74
vendor: WongKinYiu
product: yolov9
affected:
  - yolov9 0.1
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:00:15.472Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111991'
references:
  - url: 'https://vuldb.com/vuln/421656'
    label: >-
      VDB-421656 | WongKinYiu yolov9 ONNX Metadata common.py
      DetectMultiBackend.__init__ code injection
  - url: 'https://vuldb.com/vuln/421656/cti'
    label: 'VDB-421656 | CTI Indicators (IOB, IOC, TTP, IOA)'
  - url: 'https://vuldb.com/cve/CVE-2026-111991'
    label: CVE-2026-111991 | CVE Analysis and Report
  - url: 'https://vuldb.com/submit/1007973'
    label: >-
      Submit #1007973 | WongKinYiu yolov9 up to commit
      5b1ea9a8b3f0ffe4fe0e203ec6232d788bb3fcff (master HEAD, 2024-06-10) Code
      Injection
  - url: 'https://github.com/WongKinYiu/yolov9/issues/670'
  - url: 'https://github.com/WongKinYiu/yolov9/'
tags:
  - cve.org
ingestedAt: '2026-10-18T15:45:12.308Z'
---

## Overview

A security vulnerability has been detected in WongKinYiu yolov9 0.1. This vulnerability affects the function DetectMultiBackend.__init__ of the file models/common.py of the component ONNX Metadata Handler. The manipulation of the argument names/stride leads to code injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

## Affected

- `yolov9 0.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.