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CVE-2026-118383

10, critical

MongoDB Server Use-After-Free Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
10, critical critical CVSS v3.1
EPSS, next 30 days
0.7% higher than 54.2% of scored CVEs
Exploitation
No public evidence
Published
10 Nov 20264 days ago

Description

A use-after-free in the replication component of MongoDB Server can occur when a newly elected replica set primary completes catch-up. The condition can be caused by requests that do not require authentication, and may result in the server terminating unexpectedly or, under certain conditions, arbitrary code execution in the context of the server process. Replica set members are affected, including the shard and config server replica set members of sharded clusters; standalone mongod instances are not.

Details

Vendor
MongoDB
Product
MongoDB Server
Weakness
CWE-416 (opens in a new tab)
Status
Analyzed
Updated
13 Nov 2026
Assigner
cna@mongodb.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References 2

Patches and fixes 2

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other MongoDB CVEs

Every MongoDB CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2025-14847 MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability KEV EPSS 83% 7.5, high
  • CVE-2019-10758 MongoDB mongo-express Remote Code Execution Vulnerability KEV EPSS 85% 9.9, critical
  • CVE-2026-106432 The BSON encoder in the MongoDB PHP Driver converts a string length to a 32-bit value without validation EPSS 0.2% 8.2, high
  • CVE-2026-106437 MongoDB C Driver Integer Underflow Vulnerability EPSS 0.1% 7.4, high
  • CVE-2026-88027 Improper neutralization of special elements in data query logic in the embedded-document relation handling of the MongoDB integration… EPSS 0.3% 8.1, high
  • CVE-2026-88032 MongoDB Java Driver Use-After-Free Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-88033 Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB Java Driver can cause a… EPSS 0.5% 8.3, high
  • CVE-2026-82066 MongoDB Server Out-of-Bounds Read Vulnerability EPSS 0.4% 8.1, high

Beyond this page

Is CVE-2026-118383 in your network?

This page tells you how dangerous CVE-2026-118383 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 14 Nov 2026, not the live upstream state.