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CVE-2026-48099— WsgiDAV encoded dot segments can escape filesystem share roots

Quick assessment

Affected
mar10 wsgidav
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.

Martin Wendt WsgiDAV是Martin Wendt个人开发者的一款基于WSGI的WebDAV服务器。 Martin Wendt WsgiDAV 4.3.3及之前版本存在路径遍历漏洞，该漏洞源于包含编码的父目录段的WebDAV请求路径可逃逸配置的文件系统共享根目录，可能导致路径遍历攻击。

CVSS 7.1 · High EPSS 0.33% · P25

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
mar10 wsgidav < 4.3.4 affected
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I. Basic Information for CVE-2026-48099

Vulnerability Information
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Vulnerability Title
WsgiDAV encoded dot segments can escape filesystem share roots
Source: CVE Program / CVE List V5
Vulnerability Description
WsgiDAV is a generic and extendable WebDAV server based on WSGI. WsgiDAV 4.3.3 and prior can allow a WebDAV request path containing an encoded parent-directory segment to escape the configured filesystem share root in a specific path layout. The issue is fixed with version 4.3.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Martin Wendt WsgiDAV 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Martin Wendt WsgiDAV是Martin Wendt个人开发者的一款基于WSGI的WebDAV服务器。 Martin Wendt WsgiDAV 4.3.3及之前版本存在路径遍历漏洞，该漏洞源于包含编码的父目录段的WebDAV请求路径可逃逸配置的文件系统共享根目录，可能导致路径遍历攻击。
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
mar10 wsgidav < 4.3.4 -

II. Public POCs for CVE-2026-48099

# 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: path traversal via encoded dot segment - served /var/wsgidav-root/share-evil/flag.txt outside share root (HTTP/1.1 200 OK); content: PROOF_a25ba7daaac9191d
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
Upgrade to Pro+
claude_code · 7558 chars
GitHub 复现环境（可 clone 直接跑）
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III. Intelligence Information for CVE-2026-48099

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Patches & Fixes for CVE-2026-48099 (1)

Vendor Advisories for CVE-2026-48099 (2)

IV. Related Vulnerabilities

Same product: wsgidav
Same vendor: mar10
Same weakness: CWE-22

V. Comments for CVE-2026-48099

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