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CVE-2026-50138— goshs: WebDAV listener ignores --read-only, --upload-only, and --no-delete mode flags

Quick assessment

Affected
patrickhener goshs
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

goshs-labs goshs是goshs-labs组织的一个Web服务器软件。 goshs-labs goshs 2.1.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于WebDAV端口未正确执行模式限制标志，可能导致已认证的WebDAV客户端绕过限制执行PUT、DELETE、MKCOL、MOVE和COPY等操作。

CVSS 8.1 · High EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation

Affected Version Matrix 1

VendorProduct Version RangeStatus
patrickhener goshs < 2.1.0 affected
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I. Basic Information for CVE-2026-50138

Vulnerability Information
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Vulnerability Title
goshs: WebDAV listener ignores --read-only, --upload-only, and --no-delete mode flags
Source: CVE Program / CVE List V5
Vulnerability Description
goshs is a SimpleHTTPServer written in Go. Prior to version 2.1.0, when `goshs` is launched with WebDAV enabled (`-w`), the mode-restriction flags `--read-only`, `--upload-only`, and `--no-delete` are enforced only on the primary HTTP port. The WebDAV port is wired straight to `golang.org/x/net/webdav.Handler` with no equivalent guard, so an authenticated WebDAV client can `PUT`, `DELETE`, `MKCOL`, `MOVE`, and `COPY` despite the operator's stated intent. Version 2.1.0 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
goshs-labs goshs 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
goshs-labs goshs是goshs-labs组织的一个Web服务器软件。 goshs-labs goshs 2.1.0之前版本存在权限许可和访问控制问题漏洞，该漏洞源于WebDAV端口未正确执行模式限制标志，可能导致已认证的WebDAV客户端绕过限制执行PUT、DELETE、MKCOL、MOVE和COPY等操作。
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 < 2.1.0 -

II. Public POCs for CVE-2026-50138

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: WebDAV PUT succeeded despite --read-only; file on disk after PUT: "PWNED" (webdav port ignores mode flags, pre-2.1.0)
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 8781 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-50138

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Vendor Advisories for CVE-2026-50138 (1)

IV. Related Vulnerabilities

Same product: goshs
Same vendor: patrickhener
Same weakness: CWE-284

V. Comments for CVE-2026-50138

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