---
id: CVE-2026-120952
title: >-
  MongoDB Atlas SQL ODBC Driver writes 48-byte Extended JSON into fixed 16-byte
  SQL_C_GUID target, causing a 32-byte out-of-bounds write
summary: >-
  An out-of-bounds write in the MongoDB Atlas SQL ODBC Driver may be triggered
  when a value of a particular database type is retrieved into a fixed-width
  client-side target. The driver produces a textual form of the value that is
  longer th…
severity: high
cvss: 7.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: MongoDB
product: Atlas SQL ODBC Driver
affected:
  - atlas_sql_odbc_driver >= 0.0.1 < 3.0.1
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T20:16:12.683Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120952'
references:
  - url: 'https://www.mongodb.com/docs/sql-interface/changelog/'
  - url: 'https://jira.mongodb.org/browse/SQL-3539'
tags:
  - cve.org
epss: 0.00364
epssPercentile: 0.30367
ingestedAt: '2026-11-05T20:33:06.438Z'
---

## Overview

An out-of-bounds write in the MongoDB Atlas SQL ODBC Driver may be triggered when a value of a particular database type is retrieved into a fixed-width client-side target. The driver produces a textual form of the value that is longer than the fixed target the ODBC interface defines, and copies it without limiting the copy to the target's real size. A database user with basic write privileges can influence part of the data written outside the target, which may corrupt memory in the application using the driver and cause that application to terminate unexpectedly.

## Affected

- `atlas_sql_odbc_driver >= 0.0.1 < 3.0.1`

## Remediation

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