---
id: CVE-2026-82062
title: >-
  A security issue in MongoDB Server allows an authenticated user with elevated
  internal privileges to bypass a disabled feature gate in the applyOps command
  by specifying an internal replication mode value that was not intended to be
  clie…
summary: >-
  A security issue in MongoDB Server allows an authenticated user with elevated
  internal privileges to bypass a disabled feature gate in the applyOps command
  by specifying an internal replication mode value that was not intended to be
  clie…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L'
cwe:
  - CWE-863
vendor: mongodb
product: mongodb
affected:
  - 'mongodb >= 8.3.0, < 8.3.9'
patched:
  - mongodb 8.3.9
published: '2026-09-08'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:36:47.630'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82062'
references:
  - url: 'https://jira.mongodb.org/browse/SERVER-131138'
    label: cna@mongodb.com
tags:
  - nvd
  - cve.org
epss: 0.00454
epssPercentile: 0.36711
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T17:58:41.586379Z'
ingestedAt: '2026-09-08T16:34:19.257Z'
---

## Overview

A security issue in MongoDB Server allows an authenticated user with elevated internal privileges to bypass a disabled feature gate in the applyOps command by specifying an internal replication mode value that was not intended to be client-selectable. This bypass enables execution of container operations that are disabled by default in production configurations, allowing direct storage-engine writes to arbitrary internal storage tables. The authorization check for these operations validates only the operation's namespace, not the actual storage target, enabling writes to unrelated internal metadata or other collections' data.

## Affected

- `mongodb >= 8.3.0, < 8.3.9`

## Remediation

Upgrade past the affected range:

- `mongodb 8.3.9`