---
id: CVE-2026-18888
title: >-
  The MongoDB BI Connector ODBC Driver converts floating point column values
  into text without checking that the result fits within the destination buffer
summary: >-
  The MongoDB BI Connector ODBC Driver converts floating point column values
  into text without checking that the result fits within the destination buffer.
  When an application reads a sufficiently large floating point value as text,
  the dr…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-787
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: '2026-09-11T18:52:17.057'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18888'
references:
  - url: >-
      https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9
    label: cna@mongodb.com
tags:
  - nvd
epss: 0.00316
epssPercentile: 0.21869
ingestedAt: '2026-09-11T19:57:09.303Z'
---

## Overview

The MongoDB BI Connector ODBC Driver converts floating point column values into text without checking that the result fits within the destination buffer. When an application reads a sufficiently large floating point value as text, the driver may write beyond the end of that buffer and corrupt adjacent memory. A user who can store data in a collection read through the BI Connector could use this to crash the application performing the read.

## Affected

- `bi_connector_odbc_driver >= 1.0.0, < 1.4.9`

## Remediation

Upgrade past the affected range:

- `bi_connector_odbc_driver 1.4.9`