# CVE-2026-81532: MongoDB Connector for BI ODBC driver buffer overflow in cursor name handling

Source: https://junglewise.ai/threats/cve-2026-81532-mongodb-connector-for-bi-odbc-driver-buffer-overflow-in-cursor  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-28. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-81532 · Severity: high · CVSS 8.8 · Published 2026-08-28

The MongoDB Connector for BI ODBC driver is used to enable SQL-based access to MongoDB databases from business intelligence and reporting tools. An attacker who can submit SQL queries can cause a buffer overflow by specifying an overly long cursor name, which can crash the application or potentially execute arbitrary code within the host application's process.

Technologies: [MongoDB Bi Connector Odbc Driver](https://junglewise.ai/threats/technologies/bi-connector-odbc-driver). Vendors: [MongoDB](https://junglewise.ai/threats/vendors/mongodb).

## Quick answers

**Is CVE-2026-81532 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81532 being exploited in the wild.

**How severe is CVE-2026-81532?** High severity, with a CVSS score of 8.8, published 28 August 2026.

**Which products and versions are affected?** MongoDB Connector for BI ODBC driver before 1.4.10.

**Is there a fix for CVE-2026-81532?** A patch was published on 2026-08-28: Version 1.4.10 released with cursor name truncation logic Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-81532 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-81532?** Check whether you run MongoDB Bi Connector Odbc Driver or MongoDB Connector for BI ODBC driver at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

This is a classic stack-based buffer overflow vulnerability in the MongoDB Connector for BI ODBC driver. The vulnerable code fails to validate the length of a cursor name in a positioned-cursor SQL statement before copying it into a fixed-length internal buffer when building a diagnostic message. An attacker with the ability to submit SQL queries to an application using this driver can trigger the overflow by providing a cursor name that exceeds the buffer's capacity, overwriting adjacent memory with attacker-controlled data. The impact ranges from denial of service (application crash) to remote code execution. The vulnerability was patched in version 1.4.10 by adding logic to truncate cursor names to fit within the buffer.

## Affected products

- MongoDB Connector for BI ODBC driver before 1.4.10

## Timeline

- 2026-08-28: disclosed
- 2026-08-28: patched: Version 1.4.10 released with cursor name truncation logic

## References

- [https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases](https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases)

## Related threats

- [MongoDB BI Connector ODBC Driver buffer overflow in LIMIT parsing](https://junglewise.ai/threats/cve-2026-81533-mongodb-bi-connector-odbc-driver-buffer-overflow-in-limit-parsing)
- [MongoDB BI Connector ODBC Driver buffer overflow in DSN path handling](https://junglewise.ai/threats/cve-2026-19003-mongodb-bi-connector-odbc-driver-buffer-overflow-in-dsn-path)
- [MongoDB BI Connector ODBC Driver memory safety issue in output parameter handling](https://junglewise.ai/threats/cve-2026-19004-mongodb-bi-connector-odbc-driver-memory-safety-issue-in-output)
- [MongoDB BI Connector ODBC Driver out-of-bounds write in parameter metadata parsing](https://junglewise.ai/threats/cve-2026-19002-mongodb-bi-connector-odbc-driver-out-of-bounds-write-in-parameter)
- [MongoDB BI Connector ODBC Driver buffer overflow in metadata functions](https://junglewise.ai/threats/cve-2026-19001-mongodb-bi-connector-odbc-driver-buffer-overflow-in-metadata)