PT-2026-40531 · Mongodb · Mongodb Server

Published 2026-05-13 · Updated 2026-05-13 · CVE-2026-8336

Mitre

CVSS v3.1

7.5

High

Base vector

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

After invoking $ internalJsEmit, which is not intended to be directly accessible, or mapreduce command’s map function in a certain way, an authenticated user can subsequently crash mongod when the server-side JavaScript engine (through $where, $function, mapreduce reduce stage, etc.) is used also in a specific way, resulting in a post-authentication denial-of-service.

This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-8336

Affected Products

Mongodb Server

References · 1

• https://jira.mongodb.org/browse/SERVER-121610 · Note