# CVE-2026-81533: MongoDB BI Connector ODBC Driver Memory-Safety Issue When Parsing Oversized LIMIT Values

> CVE-2026-81533: MongoDB BI Connector ODBC Driver Memory-Safety Issue When Parsing Oversized LIMIT Values. CVSS 7.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-81533
Last updated: 2026-09-11T18:53:28Z

- Published: 2026-08-28 20:28 UTC · Updated: 2026-09-11 18:53 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: 0.37%, 30th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-121

## Description

An application using the MongoDB BI Connector ODBC Driver may encounter a memory-safety issue when a submitted SQL statement contains an unusually long run of digits following a LIMIT clause. The issue occurs only on connections where the driver's optional prefetch setting is enabled, and stems from the driver copying the digit sequence into a fixed-size internal buffer without checking its length. A user able to influence the numeric portion of a LIMIT clause could cause the hosting application process to terminate unexpectedly or corrupt adjacent memory in that process.

## Affected vendors and products

- MongoDB: BI Connector 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-2026-81533)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-81533)
- [https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases](https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases)

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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-2026-81533 · Markdown: https://rewindex.com/cve/CVE-2026-81533.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-81533 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:19.023Z