An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management… (CVE-2026-18706)
CVE-2026-18706 is a high severity vulnerability in MongoDB Server's $graphLookup aggregation stage. An authenticated user with permissions to run aggregation and memory-management commands can trigger a use-after-free condition. This flaw may cause the server to crash or potentially allow execution of unintended code.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free issue (CWE-416) in the $graphLookup aggregation stage of MongoDB Server. An authenticated user able to issue aggregation and memory-management commands can cause an internal reference to be used after the underlying memory has been freed. The consequence of this flaw includes server crashes and the potential for executing unintended code. The CVSS 3.1 score is 6.6, reflecting high severity with network attack vector, high attack complexity, and requiring high privileges but no user interaction.
Potential Impact
Successful exploitation can lead to denial of service via server crashes or potentially arbitrary code execution within the MongoDB server process. This could compromise the availability and integrity of the database server. The attacker must be authenticated and have permissions to run aggregation and memory-management commands.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to aggregation and memory-management commands to trusted users only.
An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management… (CVE-2026-18706)
Description
CVE-2026-18706 is a high severity vulnerability in MongoDB Server's $graphLookup aggregation stage. An authenticated user with permissions to run aggregation and memory-management commands can trigger a use-after-free condition. This flaw may cause the server to crash or potentially allow execution of unintended code.
CVSS v3.1
Score 6.6medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free issue (CWE-416) in the $graphLookup aggregation stage of MongoDB Server. An authenticated user able to issue aggregation and memory-management commands can cause an internal reference to be used after the underlying memory has been freed. The consequence of this flaw includes server crashes and the potential for executing unintended code. The CVSS 3.1 score is 6.6, reflecting high severity with network attack vector, high attack complexity, and requiring high privileges but no user interaction.
Potential Impact
Successful exploitation can lead to denial of service via server crashes or potentially arbitrary code execution within the MongoDB server process. This could compromise the availability and integrity of the database server. The attacker must be authenticated and have permissions to run aggregation and memory-management commands.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Until a patch is available, restrict access to aggregation and memory-management commands to trusted users only.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pv5p-66r3-9fq9
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-18706"]
- Ecosystems
- []
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a7c9b70bf8831d539ce031f
Added to database: 08/12/2026, 16:12:32 UTC
Last enriched: 08/12/2026, 17:25:51 UTC
Last updated: 08/13/2026, 03:41:00 UTC
Views: 2
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