Buffer overflow in MongoDB Bi Connector Odbc Driver
CVE-2026-81533
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.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-81533?
- CVE-2026-81533 is a high-severity vulnerability in MongoDB Bi Connector Odbc Driver, classified under Stack-based Buffer Overflow. CVSS score: 7.1/10. Published 2026-08-28.
- How severe is CVE-2026-81533?
- High severity. CVSS v3 base score is 7.1 out of 10.