CVE-2026-40884— goshs: Empty-username SFTP password authentication bypass in goshs
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I. Basic Information for CVE-2026-40884
Vulnerability Information
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Vulnerability Title
goshs: Empty-username SFTP password authentication bypass in goshs
Source: NVD (National Vulnerability Database)
Vulnerability Description
goshs is a SimpleHTTPServer written in Go. Prior to 2.0.0-beta.6, goshs contains an SFTP authentication bypass when the documented empty-username basic-auth syntax is used. If the server is started with -b ':pass' together with -sftp, goshs accepts that configuration but does not install any SFTP password handler. As a result, an unauthenticated network attacker can connect to the SFTP service and access files without a password. This vulnerability is fixed in 2.0.0-beta.6.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键功能的认证机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
goshs 访问控制错误漏洞
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.6之前版本存在访问控制错误漏洞，该漏洞源于使用文档记录的空用户名基本身份验证语法时，未安装SFTP密码处理程序，可能导致未经身份验证的网络攻击者无需密码访问SFTP服务。
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)
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Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| patrickhener | goshs | < 2.0.0-beta.6 | - |
II. Public POCs for CVE-2026-40884
| # | POC Description | Source Link | Shenlong Link |
|---|
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Advisory · 1
Same Patch Batch · patrickhener · 2026-04-21 · 5 CVEs total
| CVE-2026-40903 | 9.1 CRITICAL | Goshs - ArtiPACKED Vulnerability – GitHub Actions Credential Persistence |
| CVE-2026-40876 | SFTP root escape via prefix-based path validation in goshs | |
| CVE-2026-40883 | goshs: CSRF in state-changing GET routes enables authenticated file deletion and directory | |
| CVE-2026-40885 | goshs: Public collaborator feed leaks .goshs ACL credentials and enables unauthorized acce |
IV. Related Vulnerabilities
Same product: goshs
- CVE-2026-42091
goshs has Cross-Origin Arbitrary File Write via Missing CSRF - CVE-2026-40903
Goshs - ArtiPACKED Vulnerability – GitHub Actions Credential - CVE-2026-40885
goshs: Public collaborator feed leaks .goshs ACL credentials - CVE-2026-40883
goshs: CSRF in state-changing GET routes enables authenticat - CVE-2026-40876
SFTP root escape via prefix-based path validation in goshs
Same vendor: patrickhener
- CVE-2026-42091
goshs has Cross-Origin Arbitrary File Write via Missing CSRF - CVE-2026-40903
Goshs - ArtiPACKED Vulnerability – GitHub Actions Credential - CVE-2026-40885
goshs: Public collaborator feed leaks .goshs ACL credentials - CVE-2026-40883
goshs: CSRF in state-changing GET routes enables authenticat - CVE-2026-40876
SFTP root escape via prefix-based path validation in goshs
Same weakness: CWE-306
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WordPress Plugin Peugeot Music 1.0 Arbitrary File Upload - CVE-2018-25332
GitBucket 4.23.1 Unauthenticated Remote Code Execution - CVE-2026-8737
Sanluan PublicCMS Trade Address Query TradeAddressListDirect - CVE-2026-45397
Open WebUI: Unauthenticated RAG Configuration Disclosure - CVE-2026-45248
Hedera Guardian Authentication Bypass Information Disclosure
V. Comments for CVE-2026-40884
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