---
id: CVE-2026-106428
title: >-
  An out-of-bounds read in SCRAM authentication response parsing in the MongoDB
  C Driver can read one byte beyond a fixed-size buffer when processing a
  malformed server-final message
summary: >-
  An out-of-bounds read in SCRAM authentication response parsing in the MongoDB
  C Driver can read one byte beyond a fixed-size buffer when processing a
  malformed server-final message. A server or network intermediary able to
  provide this m…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-125
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T20:49:23.240'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-106428'
references:
  - url: 'https://jira.mongodb.org/browse/CDRIVER-6370'
    label: cna@mongodb.com
tags:
  - nvd
ingestedAt: '2026-10-08T20:06:22.181Z'
---

## Overview

An out-of-bounds read in SCRAM authentication response parsing in the MongoDB C Driver can read one byte beyond a fixed-size buffer when processing a malformed server-final message. A server or network intermediary able to provide this message before server-signature verification can cause the application using the driver to terminate. The extra byte is not returned through the protocol.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.