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CVE-2026-1848— Connections received from the proxy port may not count towards total accepted connections

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存在安全漏洞，该漏洞源于从代理端口接收的连接可能不计入总接受连接数，可能导致服务器崩溃。

CVSS 7.5 · High EPSS 0.28% · P18

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-1848

Vulnerability Information
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Vulnerability Title
Connections received from the proxy port may not count towards total accepted connections
Source: CVE Program / CVE List V5
Vulnerability Description
Connections received from the proxy port may not count towards total accepted connections, resulting in server crashes if the total number of connections exceeds available resources. This only applies to connections accepted from the proxy port, pending the proxy protocol header.
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
不加限制或调节的资源分配
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，该漏洞源于从代理端口接收的连接可能不计入总接受连接数，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 8.2 ~ 8.2.4 -

II. Public POCs for CVE-2026-1848

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III. Intelligence Information for CVE-2026-1848

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Same Patch Batch · MongoDB Inc · 2026-02-10 · 11 CVEs total

CVE-2026-25611 7.5 HIGH Pre-Authentication Memory Exhaustion Denial of Service in MongoDB Server
CVE-2026-25612 6.5 MEDIUM Internal ResourceId collision may affect unrelated collections
CVE-2026-25613 6.5 MEDIUM An unsafe cast in the MongoDB query planner can result in a segmentation fault.
CVE-2026-25610 6.5 MEDIUM Invalid $geoNear index hint may cause server crash
CVE-2026-1850 6.5 MEDIUM An authorized user may disable the MongoDB server by issuing a certain type of complex que
CVE-2026-1847 6.5 MEDIUM MongoDB Server may crash when inserting large documents
CVE-2026-1849 6.5 MEDIUM Mongod can run out of stack memory when expressions create deeply nested documents
CVE-2026-2302 6.5 MEDIUM Unsafe Reflection in Mongoid::Criteria.from_hash
CVE-2026-2303 6.5 MEDIUM Heap Out-of-Bounds Read in Go Driver GSSAPI C Wrappers enables application crash or inform
CVE-2026-25609 5.4 MEDIUM profile command may permit unauthorized configuration

IV. Related Vulnerabilities

Same product: MongoDB Server
Same vendor: MongoDB Inc
Same weakness: CWE-770

V. Comments for CVE-2026-1848

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