Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-9750— Metadata name collision on $-prefixed fields causes post-auth server crash

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存在安全漏洞，该漏洞源于用户控制的文档字段与内部元数据分离不足，可能导致经过身份验证的用户通过创建干扰查询执行期间内部元数据处理的文档使服务器崩溃或返回错误结果。

CVSS 6.5 · Medium EPSS 0.57% · P45

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood

Affected Version Matrix 4

VendorProduct Version RangeStatus
MongoDB MongoDB Server 8.3.0< 8.3.3 affected
8.2.0< 8.2.10 affected
8.0.0< 8.0.24 affected
7.0.0< 7.0.35 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-9750

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Metadata name collision on $-prefixed fields causes post-auth server crash
Source: CVE Program / CVE List V5
Vulnerability Description
An authenticated user can cause a MongoDB server to crash or return incorrect results by creating documents that interfere with internal metadata processing during query execution. This stems from insufficient separation between user-controlled document fields and internal metadata in certain execution paths.
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
可达断言
Source: CVE Program / CVE List V5
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存在安全漏洞，该漏洞源于用户控制的文档字段与内部元数据分离不足，可能导致经过身份验证的用户通过创建干扰查询执行期间内部元数据处理的文档使服务器崩溃或返回错误结果。
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 ~ 8.3.3 -

II. Public POCs for CVE-2026-9750

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-9750

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-9750 (1)

Same Patch Batch · MongoDB · 2026-06-09 · 14 CVEs total

CVE-2026-9753 8.1 HIGH Server crash via malformed binary diff passed to $_internalApplyOplogUpdate.
CVE-2026-9740 7.5 HIGH Unbounded recursion in BSONColumn interleaved-reference causes pre-auth stack overflow
CVE-2026-9742 7.5 HIGH Authenticate command with specific mechanism parameter can trigger server crash
CVE-2026-9748 6.5 MEDIUM $_internalConvertBucketIndexStats may crash the mongod server when working on no timeserie
CVE-2026-9747 6.5 MEDIUM Crafted cross-shard merge aggregation crashes MongoDB Server
CVE-2026-9741 6.5 MEDIUM Client side encryption fails to encrypt values in a $vectorSearch
CVE-2026-9749 6.5 MEDIUM Using MaxKey() may crash the server
CVE-2026-9752 6.5 MEDIUM GeometryCollection with strict-winding polygon causes server crash during 2dsphere index k
CVE-2026-9746 6.5 MEDIUM Server crashes in case of the use of exchange
CVE-2026-9743 6.5 MEDIUM Aggregation sub-pipeline null dereference may allow DoS via crafted getMore
CVE-2026-9754 6.5 MEDIUM Stack memory disclosure in filemd5 command
CVE-2026-9751 5.5 MEDIUM Sensitive data could be written to mongod.log
CVE-2026-9735 5.5 MEDIUM Keyfile contents are in MongoDB Server logs

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-9750

No comments yet

Leave a comment