CVE-2026-9753
Received Received - Intake
MongoDB $_internalApplyOplogUpdate Memory Corruption Vulnerability

Publication date: 2026-06-09

Last updated on: 2026-06-09

Assigner: MongoDB, Inc.

Description
The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authenticated user with access to the aggregate command.
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Meta Information
Published
2026-06-09
Last Modified
2026-06-09
Generated
2026-06-10
AI Q&A
2026-06-10
EPSS Evaluated
N/A
NVD
CVE-2026-9753
EUVD
EUVD-2026-35852
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mongodb $_internalapplyoplogupdate *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-1287 The product receives input that is expected to be of a certain type, but it does not validate or incorrectly validates that the input is actually of the expected type.
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Executive Summary

This vulnerability involves the $_internalApplyOplogUpdate aggregation pipeline stage in MongoDB. It can be exploited by any authenticated user with access to the aggregate command by using a document diff containing a malformed binary diff. This malformed input can cause the server to return memory out-of-bounds or crash.

Impact Analysis

The vulnerability can lead to a server crash or memory corruption, which may cause denial of service or instability in the MongoDB server. Since any authenticated user with aggregate command access can exploit it, this could disrupt database availability and reliability.

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