CVE-2026-96746 HIGH

CVE-2026-96746: Heap buffer overflow via mid-scan command list growth in client topology monitoring

Vendor Mongodb
Product C Driver
Weakness CWE-787
Published September 24, 2026
Last update September 24, 2026

CVSS base score

8.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 24, 2026 CVE published