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CVE-2026-11933— Post-authentication use-after-free in server-side JavaScript BSON-to-array conversion

Quick assessment

Affected
MongoDB MongoDB
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是美国MongoDB公司开源的一种面向文档的数据库管理系统。 MongoDB存在缓冲区错误漏洞，该漏洞源于服务器端JavaScript引擎在将BSON文档转换为JavaScript数组时存在释放后重用问题，可能导致经过身份验证且具有读取权限的用户运行服务器端JavaScript时访问已释放的内存，从而导致信息泄露或服务器崩溃。

CVSS 8.8 · High EPSS 0.38% · P30

Affected Version Matrix 7

VendorProduct Version RangeStatus
MongoDB MongoDB 8.3.0≤ 8.3.3 affected
8.2.0≤ 8.2.10 affected
8.0.0≤ 8.0.25 affected
7.0.0≤ 7.0.36 affected
6.0≤ 6.0.28 affected
5.0≤ 5.0.33 affected
4.4.0≤ 4.4.30 affected
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I. Basic Information for CVE-2026-11933

Vulnerability Information
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Vulnerability Title
Post-authentication use-after-free in server-side JavaScript BSON-to-array conversion
Source: CVE Program / CVE List V5
Vulnerability Description
A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.
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 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MongoDB是美国MongoDB公司开源的一种面向文档的数据库管理系统。 MongoDB存在缓冲区错误漏洞，该漏洞源于服务器端JavaScript引擎在将BSON文档转换为JavaScript数组时存在释放后重用问题，可能导致经过身份验证且具有读取权限的用户运行服务器端JavaScript时访问已释放的内存，从而导致信息泄露或服务器崩溃。
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 MongoDB 8.3.0 ~ 8.3.3 -

II. Public POCs for CVE-2026-11933

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III. Intelligence Information for CVE-2026-11933

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Patches & Fixes for CVE-2026-11933 (1)

IV. Related Vulnerabilities

Same product: MongoDB
Same vendor: MongoDB
Same weakness: CWE-787

V. Comments for CVE-2026-11933

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