# CVE-2026-19004: MongoDB BI Connector ODBC Driver memory safety issue in output parameter handling

Source: https://junglewise.ai/threats/cve-2026-19004-mongodb-bi-connector-odbc-driver-memory-safety-issue-in-output  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-12. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-19004 · Severity: high · CVSS 8.1 · Published 2026-08-12

The MongoDB BI Connector ODBC Driver is used by applications to connect to MongoDB databases via ODBC. A memory-safety vulnerability in how the driver processes output parameters from stored procedures could allow an attacker controlling a database server to crash the application, leak sensitive data from memory, or potentially execute arbitrary code.

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-2026-19004 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-19004 being exploited in the wild.

**How severe is CVE-2026-19004?** High severity, with a CVSS score of 8.1, published 12 August 2026.

**Which products and versions are affected?** MongoDB Bi Connector Odbc Driver before 1.4.9.

**Is there a fix for CVE-2026-19004?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-19004 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-19004?** Check whether you run MongoDB Bi Connector 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

The vulnerability is a memory-safety issue (buffer handling/overflow) in the ODBC driver's output parameter processing logic. It is triggered when connecting to an untrusted or impersonated database server that returns crafted metadata with unclamped buffer sizes. The attack requires network access to a database the application connects to, but does not require authentication to the application itself. Successful exploitation can result in process termination (denial of service), disclosure of process memory contents, or under certain conditions arbitrary code execution. The fix (clamping buffer sizes) was included in version 1.4.9 released on 06 Aug.

## Affected products

- MongoDB BI Connector ODBC Driver before 1.4.9

## Timeline

- 2026-08-12: disclosed

## References

- [https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9](https://github.com/mongodb/mongo-bi-connector-odbc-driver/releases/tag/v1.4.9)

## 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 Connector for BI ODBC driver buffer overflow in cursor name handling](https://junglewise.ai/threats/cve-2026-81532-mongodb-connector-for-bi-odbc-driver-buffer-overflow-in-cursor)
- [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 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)