perfree go-fastdfs-web up to 1.3.7 Installation Endpoint /install/checkServer server-side request forgery

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in perfree go-fastdfs-web up to 1.3.7. It has been classified as critical. Affected by this vulnerability is the function checkServer of the file /install/checkServer of the component Installation Endpoint. The manipulation leads to server-side request forgery. This vulnerability is uniquely identified as CVE-2026-11437. The attack is possible to be carried out remotely. Moreover, an exploit is present. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability was found in perfree go-fastdfs-web up to 1.3.7. It has been rated as critical. This issue affects the function checkServer of the file /install/checkServer of the component Installation Endpoint. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality, integrity, and availability.

The advisory is shared at notion.so. The identification of this vulnerability is CVE-2026-11437. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known.

The exploit is available at notion.so. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-34972). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Server-side request forgery
CWE: CWE-918
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/05/2026 VulDB entry created
06/06/2026 +0 days Advisory disclosed
06/07/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: notion.so
Status: Not defined

CVE: CVE-2026-11437 (🔒)
GCVE (CVE): GCVE-0-2026-11437
GCVE (VulDB): GCVE-100-369017
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/06/2026 00:17
Updated: 06/07/2026 02:10
Changes: 06/06/2026 00:17 (57), 06/07/2026 02:10 (1)
Complete: 🔍
Submitter: din4
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #822726: perfree go-fastdfs-web ≤1.3.7 Server-Side Request Forgery (by din4)

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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