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CVE-2026-40189— goshs has a file-based ACL authorization bypass in goshs state-changing routes

Quick assessment

Affected
patrickhener goshs
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.

goshs是Patrick Hener个人开发者的一个用Go编写的简单HTTP Server。 goshs 2.0.0-beta.4之前版本存在安全漏洞，该漏洞源于未对状态更改路由强制执行相同的授权检查，可能导致未经身份验证的攻击者在受.goshs保护的目录内上传、创建目录、删除文件，并通过删除.goshs文件本身移除文件夹的认证策略，从而绕过授权。

AI Predicted 9.8 Difficulty: Easy EPSS 0.66% · P50
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I. Basic Information for CVE-2026-40189

Vulnerability Information
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Vulnerability Title
goshs has a file-based ACL authorization bypass in goshs state-changing routes
Source: CVE Program / CVE List V5
Vulnerability Description
goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.4, goshs enforces the documented per-folder .goshs ACL/basic-auth mechanism for directory listings and file reads, but it does not enforce the same authorization checks for state-changing routes. An unauthenticated attacker can upload files with PUT, upload files with multipart POST /upload, create directories with ?mkdir, and delete files with ?delete inside a .goshs-protected directory. By deleting the .goshs file itself, the attacker can remove the folder's auth policy and then access previously protected content without credentials. This results in a critical authorization bypass affecting confidentiality, integrity, and availability. This vulnerability is fixed in 2.0.0-beta.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
goshs 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
goshs是Patrick Hener个人开发者的一个用Go编写的简单HTTP Server。 goshs 2.0.0-beta.4之前版本存在安全漏洞，该漏洞源于未对状态更改路由强制执行相同的授权检查，可能导致未经身份验证的攻击者在受.goshs保护的目录内上传、创建目录、删除文件，并通过删除.goshs文件本身移除文件夹的认证策略，从而绕过授权。
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
patrickhener goshs < 2.0.0-beta.4 -

II. Public POCs for CVE-2026-40189

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III. Intelligence Information for CVE-2026-40189

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Patches & Fixes for CVE-2026-40189 (1)

Vendor Advisories for CVE-2026-40189 (1)

Vendor Pages for CVE-2026-40189 (1)

IV. Related Vulnerabilities

Same product: goshs
Same vendor: patrickhener
Same weakness: CWE-862

V. Comments for CVE-2026-40189

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