# 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

> 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. CVSS 7.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-120952
Last updated: 2026-11-03T21:17:04Z

- Published: 2026-11-03 20:16 UTC · Updated: 2026-11-03 21:17 UTC · Assigner: mongodb
- CVSS: 7.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- EPSS: 0.36%, 30th percentile (scored 2026-11-04)
- CISA KEV: no
- CWE: CWE-787

## 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.

## Affected vendors and products

- MongoDB: Atlas SQL ODBC Driver

## Tracked companies

- [MongoDB Atlas](https://rewindex.com/company/mongodb-atlas.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-120952)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-120952)
- [https://jira.mongodb.org/browse/SQL-3539](https://jira.mongodb.org/browse/SQL-3539)
- [https://www.mongodb.com/docs/sql-interface/changelog/](https://www.mongodb.com/docs/sql-interface/changelog/)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-120952 · Markdown: https://rewindex.com/cve/CVE-2026-120952.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-120952 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-05T15:28:16.308Z