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CVE-2026-82076— Integer Overflow in Query Planner Leads to Unbounded Memory Allocation and Denial of Service in MongoDB Server

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 7.0.0至7.0.41之前版本、8.0.0至8.0.30之前版本和8.3.0至8.3.9之前版本存在数字错误漏洞，该漏洞源于查询规划组件中的整数溢出，可能导致拥有普通数据库级读写权限的已认证用户绕过内部资源限制，提交特制查询使服务器在查询规划期间无限制消耗内存，导致服务器进程终止，引发拒绝服务，影响受影响节点上的所有数据库。

CVSS 6.5 · Medium EPSS 0.41% · P34 Updated Sep 09, 2026

Possible ATT&CK Techniques 2 AI

T1027.001 · Binary Padding T1480 · Execution Guardrails

Affected Version Matrix 3

Vendor	Product	Version Range	Status
MongoDB	MongoDB Server	`8.3.0< 8.3.9`	affected
		`8.0.0< 8.0.30`	affected
		`7.0.0< 7.0.41`	affected

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I. Basic Information for CVE-2026-82076

Vulnerability Information

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Vulnerability Title

Integer Overflow in Query Planner Leads to Unbounded Memory Allocation and Denial of Service in MongoDB Server

Source: CVE Program / CVE List V5

Vulnerability Description

An integer overflow in the query planning component of MongoDB Server can allow an authenticated user with ordinary database-level read/write privileges to bypass an internal resource limit. Submitting a specially crafted query causes the server to consume memory without bound during query planning, and the resulting exhaustion terminates the server process. This may result in a denial of service affecting all databases served by the affected node.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

整数溢出或超界折返

Source: CVE Program / CVE List V5

Vulnerability Title

MongoDB Server 数字错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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 ~ 8.3.9	-

II. Public POCs for CVE-2026-82076

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-82076

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Other References for CVE-2026-82076 (1)

🔗 [SERVER-128253] Integer overflow in query planner explodeForSort() can trigger mongod denial of service - MongoDB Jira Read full article

https://www.cve.org/CVERecord?id=CVE-2026-82076

Same Patch Batch · MongoDB · 2026-09-08 · 24 CVEs total

CVE-2026-82061	8.1 HIGH	Use-After-Free in MongoDB Server Query Execution Memory Tracking Subsystem Leads to Denial
CVE-2026-82071	8.1 HIGH	Insufficient Validation of Storage Engine Configuration Options in MongoDB Server Leads to
CVE-2026-82053	8.1 HIGH	Improper Session Handling in MongoDB Server LDAP Authorization Integration Leads to Incorr
CVE-2026-82067	8.1 HIGH	Improper Case Sensitivity Handling in MongoDB Server Configuration Validation May Cause Au
CVE-2026-82064	7.5 HIGH	Unauthenticated Denial of Service in MongoDB Server via Assertion Failure in Read Concern
CVE-2026-82075	7.5 HIGH	Uncontrolled Resource Consumption in MongoDB Sharded Cluster Router Allows Unauthenticated
CVE-2026-82055	6.5 MEDIUM	Null Pointer Dereference in MongoDB Server 2dsphere Index Key Generation Leads to Denial o
CVE-2026-82065	6.5 MEDIUM	Insufficient Validation of Storage Configuration Options in MongoDB Server Leads to Persis
CVE-2026-82054	6.5 MEDIUM	Uncontrolled Resource Consumption in MongoDB Server JSON Pointer Parser Leads to Denial of
CVE-2026-82057	6.5 MEDIUM	Type Confusion in MongoDB Server WiredTiger Storage Engine via Custom Collection Configura
CVE-2026-82074	6.5 MEDIUM	Incorrect Authorization in MongoDB Server Aggregation Framework Allows Unauthorized Read A
CVE-2026-82068	6.5 MEDIUM	Persistent Fatal Assertion Crash in MongoDB Server via Crafted Retryable Write Commands Le
CVE-2026-82058	6.5 MEDIUM	Unhandled Exception in MongoDB Server JSON Schema Validation Error Generation Leads to Den
CVE-2026-82052	6.5 MEDIUM	$regexFindAll may crash mongod server when byte-matching multi-byte UTF-8 chars
CVE-2026-82073	6.5 MEDIUM	Improper Validation in MongoDB Server Aggregation Framework Allows Authorization Bypass an
CVE-2026-82070	6.5 MEDIUM	Insufficiently Protected Credentials in MongoDB Server Diagnostic Reporting Interface
CVE-2026-82062	5.5 MEDIUM	Improper Authorization in MongoDB Server applyOps Command Allows Writes to Arbitrary Inter
CVE-2026-82060	5.4 MEDIUM	Insufficient Validation of Shard Key Values in MongoDB Server Leads to Query Operator Inje
CVE-2026-82063	5.3 MEDIUM	Use-After-Free in MongoDB Server Cursor Management Component Leads to Denial of Service
CVE-2026-82056	5.3 MEDIUM	Race Condition in MongoDB Server Text Index Query Parsing Leads to Heap Use-After-Free and

Showing top 20 of 24 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: MongoDB Server

Same vendor: MongoDB

Same weakness: CWE-190