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CVE-2026-82066

8.1, high

MongoDB Server Out-of-Bounds Read Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
8.1, high high CVSS v3.1
EPSS, next 30 days
0.4% higher than 31.2% of scored CVEs
Exploitation
No public evidence
Published
8 Sept 2026a month ago

Description

A heap out-of-bounds read security issue exists in the query planning component of MongoDB Server. An authenticated user with database read and write privileges can trigger the security issue through crafted query operations, causing the server to read memory beyond allocated buffer boundaries. The revealed memory contents may be partially observable through diagnostic query statistics output.

Details

Vendor
MongoDB
Product
MongoDB Server
Weakness
CWE-125 (opens in a new tab)
Status
Analyzed
Updated
16 Sept 2026
Assigner
cna@mongodb.com

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

References 1

Advisories 1

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-2026-88027 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-2026-84964 MongoDB C Driver Double Free Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-75159 MongoDB BI Connector Double Free Vulnerability EPSS 0.3% 7.5, high

Beyond this page

Is CVE-2026-82066 in your network?

This page tells you how dangerous CVE-2026-82066 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 17 Oct 2026, not the live upstream state.