CVE-2026-81533: MongoDB BI Connector Odbc Driver

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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 products

• MongoDB BI Connector Odbc Driver: before 1.4.10 (fixed in 1.4.10)

Published 2026-08-28. Last modified 2026-09-11.