# CVE-2026-96746: mongo-c-driver: An out-of-bounds write in the connection-monitoring logic of the MongoDB C Driver may allow an unauthenticated party...

CVE-2026-96746 is fixed in mongo-c-driver on 1 platform by DEBIAN-CVE-2026-96746 (version 2.5.5-1), released October 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-96746
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 24, 2026

## Description

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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | mongo-c-driver Debian 14 | 2.5.5-1 | [DEBIAN-CVE-2026-96746](https://patchblox.com/security/data/fix/linux/debian-cve-2026-96746.md) | Oct 1, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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