CVE-2026-11933
Received Received - Intake
Use-After-Free in MongoDB Server JavaScript Engine

Publication date: 2026-06-12

Last updated on: 2026-06-12

Assigner: MongoDB, Inc.

Description
A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.
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Meta Information
Published
2026-06-12
Last Modified
2026-06-12
Generated
2026-06-12
AI Q&A
2026-06-12
EPSS Evaluated
N/A
NVD
CVE-2026-11933
EUVD
EUVD-2026-36373
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mongodb mongodb_server *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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Executive Summary

This vulnerability is a use-after-free issue in MongoDB Server's server-side JavaScript engine. It occurs when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who can run server-side JavaScript (such as via $where or $function) can cause the server to access memory that has already been freed.

Impact Analysis

Exploitation of this vulnerability may lead to disclosure of information from the mongod process memory or cause a denial of service by crashing the server.

Compliance Impact

This vulnerability allows an authenticated user with read privileges to potentially cause disclosure of information from the mongod process memory or cause a denial of service through a server crash.

Such unauthorized disclosure of information could impact compliance with data protection regulations like GDPR or HIPAA, which require safeguarding sensitive data against unauthorized access and ensuring system availability.

However, the provided information does not explicitly describe the direct effects on compliance with these standards.

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