CVE-2026-8843— Calling createIndex with certain index types can crash mongod
Possible ATT&CK Techniques 1AI
T1499 · Endpoint Denial of ServiceAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| MongoDB, Inc. | MongoDB Server | 7.0< 7.0.32 | affected |
8.0< 8.0.21 | affected | ||
8.2< 8.2.6 | affected |
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I. Basic Information for CVE-2026-8843
Vulnerability Information
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Vulnerability Title
Calling createIndex with certain index types can crash mongod
Source: NVD (National Vulnerability Database)
Vulnerability Description
Creating a "2dsphere_bucket" index on a non-timeseries bucket collection will succeed, but any subsequent attempt to insert a document which triggers updating that index will crash the server. A similar issue occurs when creating "queryable_encrypted_range" indices. This issue affects MongoDB Server v7.0 versions prior to 7.0.32, v8.0 versions prior to 8.0.21 and v8.2 versions prior to 8.2.6
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
可达断言
Source: NVD (National Vulnerability Database)
Vulnerability Title
MongoDB Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB Server是美国MongoDB公司的一套开源的NoSQL数据库。该数据库提供面向集合的存储、动态查询、数据复制及自动故障转移等功能。 MongoDB Server v7.0 7.0.32之前版本、v8.0 8.0.21之前版本和v8.2 8.2.6之前版本存在安全漏洞，该漏洞源于创建2dsphere_bucket索引或queryable_encrypted_range索引后，插入触发更新索引的文档可能导致服务器崩溃。
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, Inc. | MongoDB Server | 7.0 ~ 7.0.32 | - |
II. Public POCs for CVE-2026-8843
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-8843 (1)
IV. Related Vulnerabilities
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Post-auth memory exhaustion via bitwise match expressions
Same vendor: MongoDB, Inc.
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Heap memory out of bounds read and crash in C Driver legacy - CVE-2026-8202
Post-authentication CPU utilization DoS via $trim/$ltrim/$rt - CVE-2026-8336
Post-authentication use-after-free error in $_internalJsEmit - CVE-2026-8201
Use-After-Free in MongoDB FLE Query Analysis When Processing
Same weakness: CWE-617
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V. Comments for CVE-2026-8843
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