CVE-2026-96746 is a vulnerability in MongoDB C Driver
Published on September 24, 2026
Heap buffer overflow via mid-scan command list growth in client topology monitoring
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 Analysis
CVE-2026-96746 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-96746 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-96746
Want to know whenever a new CVE is published for MongoDB C Driver? stack.watch will email you.
Affected Versions
MongoDB C Driver:- Before 1.30.12 is affected.
- Version 2.0.0 and below 2.5.5 is affected.