CVE-2026-18706: CWE-416: Use After Free in MongoDB MongoDB Server
An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the $graphLookup aggregation stage of MongoDB Server. An authenticated user able to perform aggregation and memory-management commands can cause an internal reference to be used after the underlying memory has been freed. This memory corruption could lead to a denial of service (server crash) or potentially allow execution of unintended code. The issue is tracked as CWE-416 and affects exactly version 8.3.0 of MongoDB Server. No vendor advisory or patch information is currently available, and the vulnerability is not related to MongoDB's cloud service.
Potential Impact
Successful exploitation could cause the MongoDB Server to crash, resulting in denial of service. There is also a potential for execution of unintended code, which could lead to further compromise of the server. The impact requires an authenticated user with high privileges to issue aggregation and memory-management commands.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to aggregation and memory-management commands to trusted users only and monitor for unusual activity related to $graphLookup usage.
CVE-2026-18706: CWE-416: Use After Free in MongoDB MongoDB Server
Description
An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.
CVSS v4.0
Score 7.5high
Affected software
MongoDB
MongoDB Server
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the $graphLookup aggregation stage of MongoDB Server. An authenticated user able to perform aggregation and memory-management commands can cause an internal reference to be used after the underlying memory has been freed. This memory corruption could lead to a denial of service (server crash) or potentially allow execution of unintended code. The issue is tracked as CWE-416 and affects exactly version 8.3.0 of MongoDB Server. No vendor advisory or patch information is currently available, and the vulnerability is not related to MongoDB's cloud service.
Potential Impact
Successful exploitation could cause the MongoDB Server to crash, resulting in denial of service. There is also a potential for execution of unintended code, which could lead to further compromise of the server. The impact requires an authenticated user with high privileges to issue aggregation and memory-management commands.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to aggregation and memory-management commands to trusted users only and monitor for unusual activity related to $graphLookup usage.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-08-03T15:53:46.316Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a7b6d42bf8831d539336151
Added to database: 08/11/2026, 18:43:14 UTC
Last enriched: 08/11/2026, 19:13:08 UTC
Last updated: 09/25/2026, 13:47:43 UTC
Views: 42
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