CVE-2026-3683Public exploitNetwork attack vector

Authenticated internal resource access via unvalidated URL fetch

Published Mar 7, 2026 · Updated Mar 7, 2026

Server-side request forgery in HotGo 2.0 allows remote authenticated users to access internal resources through an image-transfer URL. ImageTransferStorage in /server/internal/logic/common/upload.go checks only for an HTTP or HTTPS prefix before passing in.Url directly to g.Client().Get without destination validation. Authenticated endpoint access permits the server to probe internal services or metadata endpoints; retrieved content must use an image content type to reach storage.

CVSS severity6.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in HotGo 2.0 allows remote authenticated users to access internal resources through an image-transfer URL. ImageTransferStorage in /server/internal/logic/common/upload.go checks only for an HTTP or HTTPS prefix before passing in.Url directly to g.Client().Get without destination validation. Authenticated endpoint access permits the server to probe internal services or metadata endpoints; retrieved content must use an image content type to reach storage.

The record

CVE
CVE-2026-3683
Published
Mar 7, 2026
Updated
Mar 7, 2026
Vendor
Zhejiang Zoneland Zongheng Network Technology Co., Ltd.
Product
HotGo
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 7, 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=2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Zhejiang Zoneland Zongheng Network Technology Co., Ltd. · HotGoversion=2.0

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
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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