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CVE-2026-8053— FlatBSON Duplicate Field Index Drift

Quick assessment

Affected
MongoDB, Inc. 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存在缓冲区错误漏洞，该漏洞源于时间序列集合实现中内部字段名到索引映射不一致，可能导致越界内存写入，认证攻击者可触发任意代码执行。以下版本受到影响：5.0.33之前版本、6.0.28之前版本、7.0.34之前版本、8.0.23之前版本、8.2.9之前版本和8.3.2之前版本。

CVSS 8.8 · High EPSS 0.66% · P50

Affected Version Matrix 6

VendorProduct Version RangeStatus
MongoDB, Inc. MongoDB Server 5.0< 5.0.33 affected
6.0< 6.0.28 affected
7.0< 7.0.34 affected
8.0< 8.0.23 affected
8.2< 8.2.9 affected
8.3< 8.3.2 affected
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I. Basic Information for CVE-2026-8053

Vulnerability Information
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Vulnerability Title
FlatBSON Duplicate Field Index Drift
Source: CVE Program / CVE List V5
Vulnerability Description
An issue in MongoDB Server's time-series collection implementation allows an authenticated user with database write privileges to trigger an out-of-bounds memory write in the mongod process. The issue results from an inconsistency in the internal field-name-to-index mapping within the time-series bucket catalog. Under certain conditions this can result in arbitrary code execution. This issue impacts MongoDB Server v5.0 versions prior to 5.0.33, v6.0 versions prior to 6.0.28, v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
MongoDB Server 缓冲区错误漏洞
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存在缓冲区错误漏洞，该漏洞源于时间序列集合实现中内部字段名到索引映射不一致，可能导致越界内存写入，认证攻击者可触发任意代码执行。以下版本受到影响：5.0.33之前版本、6.0.28之前版本、7.0.34之前版本、8.0.23之前版本、8.2.9之前版本和8.3.2之前版本。
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 5.0 ~ 5.0.33 -

II. Public POCs for CVE-2026-8053

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III. Intelligence Information for CVE-2026-8053

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Patches & Fixes for CVE-2026-8053 (1)

IV. Related Vulnerabilities

Same product: MongoDB Server
Same vendor: MongoDB, Inc.
Same weakness: CWE-787

V. Comments for CVE-2026-8053

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