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

6.9MEDIUM

Key Information:

Vendor

Perfree

Status
Go-fastdfs-web
Vendor
CVE Published:
6 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-11437?

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.

Affected Version(s)

go-fastdfs-web 1.3.0

go-fastdfs-web 1.3.1

go-fastdfs-web 1.3.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-11437 - Proof of Concept

References

https://vuldb.com/vuln/369017
vdb-entrytechnical-description
https://vuldb.com/vuln/369017/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-11437
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

din4 (VulDB User)
VulDB CNA Team
.