---
id: CVE-2026-19003
title: >-
  A data source definition containing an over-length file path setting may cause
  the MongoDB BI Connector ODBC Driver setup dialog to write outside the bounds
  of an allocated buffer
summary: >-
  A data source definition containing an over-length file path setting may cause
  the MongoDB BI Connector ODBC Driver setup dialog to write outside the bounds
  of an allocated buffer. The issue stems from an incorrect buffer capacity
  calcul…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
vendor: mongodb
product: bi_connector_odbc_driver
affected:
  - 'bi_connector_odbc_driver >= 1.0.0, < 1.4.9'
patched:
  - bi_connector_odbc_driver 1.4.9
published: '2026-08-12'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T18:54:13.050'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19003'
references:
  - url: >-
      https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9
    label: cna@mongodb.com
tags:
  - nvd
epss: 0.00211
epssPercentile: 0.10186
ingestedAt: '2026-09-11T19:57:09.303Z'
---

## Overview

A data source definition containing an over-length file path setting may cause the MongoDB BI Connector ODBC Driver setup dialog to write outside the bounds of an allocated buffer. The issue stems from an incorrect buffer capacity calculation in the dialog's file and folder selection handling, and is reached only when a user opens the setup dialog for such a data source and initiates a file or folder selection. Depending on build configuration, the result may range from abnormal process termination to, under certain conditions, execution of unintended code in the context of the user running the dialog.

## Affected

- `bi_connector_odbc_driver >= 1.0.0, < 1.4.9`

## Remediation

Upgrade past the affected range:

- `bi_connector_odbc_driver 1.4.9`