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CVE-2026-18706— Use-After-Free in MongoDB $graphLookup Aggregation Stage Leads to Denial of Service and Potential Remote Code Execution

Quick assessment

Affected
MongoDB MongoDB Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MongoDB Server是美国MongoDB公司开源的一款面向文档的数据库系统。 MongoDB Server 8.3.0版本至8.3.8之前版本存在资源管理错误漏洞，该漏洞源于$graphLookup聚合阶段存在释放后重用问题，可能允许经过身份验证的用户通过聚合和内存管理命令导致服务器崩溃或执行意外代码。

CVSS 6.6 · Medium EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 1

VendorProduct Version RangeStatus
MongoDB MongoDB Server 8.3.0< 8.3.8 affected
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I. Basic Information for CVE-2026-18706

Vulnerability Information
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Vulnerability Title
Use-After-Free in MongoDB $graphLookup Aggregation Stage Leads to Denial of Service and Potential Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
MongoDB Server 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB Server是美国MongoDB公司开源的一款面向文档的数据库系统。 MongoDB Server 8.3.0版本至8.3.8之前版本存在资源管理错误漏洞，该漏洞源于$graphLookup聚合阶段存在释放后重用问题，可能允许经过身份验证的用户通过聚合和内存管理命令导致服务器崩溃或执行意外代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MongoDB MongoDB Server 8.3.0 ~ 8.3.8 -

II. Public POCs for CVE-2026-18706

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III. Intelligence Information for CVE-2026-18706

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Same Patch Batch · MongoDB · 2026-08-11 · 25 CVEs total

CVE-2026-18691 8.8 HIGH Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure
CVE-2026-18692 8.8 HIGH Use-After-Free in MongoDB Timeseries Bucket Handling Leads to Denial of Service and Potent
CVE-2026-18712 8.1 HIGH Improper Authorization in MongoDB Queryable Encryption Maintenance Operations Allows Unaut
CVE-2026-18690 8.1 HIGH Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections
CVE-2026-18693 7.6 HIGH Out-of-Bounds Read/Write in MongoDB Timeseries Bucket Handling Leads to Denial of Service
CVE-2026-18697 7.5 HIGH Improper Input Validation in MongoDB Aggregation Framework Allows Unauthenticated Denial o
CVE-2026-18687 7.1 HIGH Improper Validation in MongoDB Queryable Encryption Maintenance Operation Leads to Denial
CVE-2026-18694 7.1 HIGH Out-of-Bounds Read in MongoDB Geospatial Query Processing Leads to Denial of Service and P
CVE-2026-18711 7.1 HIGH Use-After-Free in MongoDB Query Execution Engine Leads to Denial of Service and Potential
CVE-2026-18688 7.1 HIGH Out-of-Bounds Read in MongoDB Aggregation Framework Leads to Denial of Service and Potenti
CVE-2026-18710 6.5 MEDIUM Cleartext Storage of Sensitive Information in MongoDB Driver Logging During Client Initial
CVE-2026-18699 6.5 MEDIUM Improper Input Validation in MongoDB Query Planner Leads to Denial of Service
CVE-2026-18696 6.5 MEDIUM Improper Authorization in MongoDB applyOps Command Handling Allows Unauthorized DDL Operat
CVE-2026-18705 6.5 MEDIUM Improper Authorization in MongoDB Atlas Vector Search Allows Unauthorized Access to Protec
CVE-2026-18701 6.5 MEDIUM Type Confusion in MongoDB Query Subsystem Leads to Denial of Service
CVE-2026-18704 6.5 MEDIUM Improper Authorization in MongoDB Aggregation Framework Allows Read-Only User to Perform U
CVE-2026-18700 6.5 MEDIUM Use-After-Free in MongoDB Geospatial Validation Leads to Denial of Service
CVE-2026-18695 6.5 MEDIUM Improper Input Validation in MongoDB Timeseries Query Processing Leads to Denial of Servic
CVE-2026-18709 6.4 MEDIUM Missing Authorization in MongoDB Sharded Transaction Commit/Abort Handling Leads to Cross-
CVE-2026-18702 6.4 MEDIUM Improper Authorization in MongoDB profile Command Allows Unauthorized Modification of Serv

Showing top 20 of 25 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: MongoDB Server
Same vendor: MongoDB
Same weakness: CWE-416

V. Comments for CVE-2026-18706

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