CVE-2026-120952

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

Published Nov 3, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Mongodb
Mongodb atlas Sql Odbc Driver
Vendors & Products Mongodb
Mongodb atlas Sql Odbc Driver
Type Values Removed Values Added
Description 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.
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
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mongodb
Published
Updated
Nov 6, 2026, 7:43 PM
Reserved
Nov 3, 2026, 2:46 AM
Status
Awaiting Analysis
Published
Nov 3, 2026, 9:17 PM
Modified
Nov 6, 2026, 8:20 PM