Buffer overflow in MongoDB Atlas SQL
CVE-2026-120959
A memory-handling flaw in the MongoDB Atlas SQL ODBC Driver can cause values returned for a query to be written outside the bounds of a buffer provided by the calling application. A party able to influence the values a query returns may cause data to be placed at an unintended location in the client application's memory, which may result in unintended modification of that memory or termination of the client process. Reaching this condition depends on a specific, application-chosen way of requesting several result rows at once.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-120959?
- CVE-2026-120959 is a low-severity vulnerability in MongoDB Atlas SQL, classified under Out-of-bounds Write. CVSS score: 3.7/10. Published 2026-11-03.
- How severe is CVE-2026-120959?
- Low severity. CVSS v3 base score is 3.7 out of 10.