Buffer overflow in MongoDB C Driver
CVE-2026-96746
An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party who controls name resolution and the responses of the hosts named in a client's connection string to write beyond the end of a heap buffer. This may cause the application using the driver to terminate unexpectedly.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
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-2026-96746?
- CVE-2026-96746 is a medium-severity vulnerability in MongoDB C Driver, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-09-24.
- How severe is CVE-2026-96746?
- Medium severity. CVSS v3 base score is 6.5 out of 10.