CVE-2026-11437Public exploitNetwork attack vector

Unauthenticated SSRF via unchecked server address

Published Jun 6, 2026 · Updated Jun 6, 2026

SSRF in Perfree go-fastdfs-web 1.3.0 through 1.3.7 allows remote attackers to send server-side HTTP requests via the installation endpoint. InstallController.checkServer validates serverAddress only as a generic URL, appends the statistics API path, and passes the result directly to HttpRequest.get. No authentication or user interaction is required when the endpoint is reachable; the server can probe HTTP services from its network position, although the endpoint does not return response bodies.

CVSS severity7.3
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Perfree go-fastdfs-web 1.3.0 through 1.3.7 allows remote attackers to send server-side HTTP requests via the installation endpoint. InstallController.checkServer validates serverAddress only as a generic URL, appends the statistics API path, and passes the result directly to HttpRequest.get. No authentication or user interaction is required when the endpoint is reachable; the server can probe HTTP services from its network position, although the endpoint does not return response bodies.

The record

CVE
CVE-2026-11437
Published
Jun 6, 2026
Updated
Jun 6, 2026
Vendor
Perfree
Product
go-fastdfs-web
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.3.0
  2. Affected versionversion=1.3.1
  3. Affected versionversion=1.3.2
  4. Affected versionversion=1.3.3
  5. Affected versionversion=1.3.4
  6. Affected versionversion=1.3.5
  7. Affected versionversion=1.3.6
  8. Affected versionversion=1.3.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Perfree · go-fastdfs-webversion=1.3.0; version=1.3.1; version=1.3.2; version=1.3.3; version=1.3.4; version=1.3.5; version=1.3.6; version=1.3.7

Published CVSS scores

5.5VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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