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CVE-2026-82064— Unauthenticated Denial of Service in MongoDB Server via Assertion Failure in Read Concern Processing on Replica Set Members

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 服务器中存在一个安全问题，使得未认证的网络用户可以针对特定类型的副本集成员造成拒绝服务（DoS）。服务器的读关注点（read concern）处理逻辑中包含一个断言（assertion），该断言可以在未认证的情况下被触发；由于该断言对内部状态的假设并不适用于所有成员配置，当条件不满足时会导致服务器进程终止。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 3

VendorProduct Version RangeStatus
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-2026-82064

Vulnerability Information
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Vulnerability Title
Unauthenticated Denial of Service in MongoDB Server via Assertion Failure in Read Concern Processing on Replica Set Members
Source: CVE Program / CVE List V5
Vulnerability Description
A security issue in MongoDB Server allows an unauthenticated network user to cause a denial of service on a specific type of replica set member. The server contains an assertion in its read concern processing logic that can be reached without authentication, and the assertion's assumptions about internal state do not hold for all member configurations, causing the server process to terminate.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MongoDB MongoDB Server 8.3.0 ~ 8.3.9 -

II. Public POCs for CVE-2026-82064

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III. Intelligence Information for CVE-2026-82064

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Vendor Pages for CVE-2026-82064 (1)

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-2026-82075 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-2026-82076 6.5 MEDIUM Integer Overflow in Query Planner Leads to Unbounded Memory Allocation and Denial of Servi
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 &rarr; →

IV. Related Vulnerabilities

Same product: MongoDB Server
Same vendor: MongoDB
Same weakness: CWE-617

V. Comments for CVE-2026-82064

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