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CVE-2026-11437— perfree go-fastdfs-web Installation Endpoint checkServer server-side request forgery

Quick assessment

Affected
perfree go-fastdfs-web
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.

go-fastdfs-web是Perfree个人开发者的一个分布式文件存储系统的Web管理平台。 go-fastdfs-web 1.3.7及之前版本存在代码问题漏洞，该漏洞源于Installation Endpoint组件文件/install/checkServer中函数checkServer的问题，可能导致服务端请求伪造。

CVSS 7.3 · High EPSS 0.41% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 8

VendorProduct Version RangeStatus
perfree go-fastdfs-web 1.3.0 affected
1.3.1 affected
1.3.2 affected
1.3.3 affected
1.3.4 affected
1.3.5 affected
1.3.6 affected
1.3.7 affected
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I. Basic Information for CVE-2026-11437

Vulnerability Information
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Vulnerability Title
perfree go-fastdfs-web Installation Endpoint checkServer server-side request forgery
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in perfree go-fastdfs-web up to 1.3.7. Affected is the function checkServer of the file /install/checkServer of the component Installation Endpoint. Executing a manipulation can lead to server-side request forgery. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
go-fastdfs-web 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
go-fastdfs-web是Perfree个人开发者的一个分布式文件存储系统的Web管理平台。 go-fastdfs-web 1.3.7及之前版本存在代码问题漏洞，该漏洞源于Installation Endpoint组件文件/install/checkServer中函数checkServer的问题，可能导致服务端请求伪造。
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
perfree go-fastdfs-web 1.3.0 cpe:2.3:a:perfree:go-fastdfs-web:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-11437

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III. Intelligence Information for CVE-2026-11437

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Security Blog Posts for CVE-2026-11437 (1)

IV. Related Vulnerabilities

Same product: go-fastdfs-web
Same vendor: perfree
Same weakness: CWE-918

V. Comments for CVE-2026-11437

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