CVE-2026-18701

Type Confusion in MongoDB Query Subsystem Leads to Denial of Service

CVE-2026-18701 is fixed in MongoDB on 1 platform by MongoDB 8.3.11 (version 8.3.11), released September 9, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.1

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0040

34th percentile

An issue in MongoDB Server's query subsystem could allow an authenticated user with read privileges to cause the server process to terminate unexpectedly by submitting a specially formed query filter. This could result in a denial of service.

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
MongoDB	8.3.11	MongoDB 8.3.11	Sep 9, 2026

Details

Published
August 11, 2026
Weakness
CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-18701

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-18701">CVE-2026-18701 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.