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CVE-2026-46492— md-fileserver: Stored/Reflected XSS when viewing Markdown (raw HTML allowed)

Quick assessment

Affected
commenthol md-fileserver
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.

md-fileserver是commenthol个人开发者的一个本地Markdown文件浏览器与渲染服务器。 md-fileserver 1.10.3之前版本存在安全漏洞，该漏洞源于Markdown渲染逻辑未对嵌入的原始HTML进行清理，可能导致跨站脚本攻击。

CVSS 7.2 · High EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
commenthol md-fileserver < 1.10.3 affected
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I. Basic Information for CVE-2026-46492

Vulnerability Information
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Vulnerability Title
md-fileserver: Stored/Reflected XSS when viewing Markdown (raw HTML allowed)
Source: CVE Program / CVE List V5
Vulnerability Description
md-fileserver allows for local viewing of markdown files in a browser. Prior to version 1.10.3, a cross-site scripting (XSS) vulnerability exists in the application’s Markdown rendering logic. When user-supplied Markdown content is rendered, embedded raw HTML—including <script> tags—is processed and injected into the resulting page without sanitization, allowing arbitrary JavaScript execution in the context of the affected domain. This issue has been patched in version 1.10.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
Web页面中脚本相关HTML标签转义处理不恰当(基本跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
md-fileserver 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
md-fileserver是commenthol个人开发者的一个本地Markdown文件浏览器与渲染服务器。 md-fileserver 1.10.3之前版本存在安全漏洞，该漏洞源于Markdown渲染逻辑未对嵌入的原始HTML进行清理，可能导致跨站脚本攻击。
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
commenthol md-fileserver < 1.10.3 -

II. Public POCs for CVE-2026-46492

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 4606 chars
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In-depth vulnerability mechanism
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-46492

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Vendor Advisories for CVE-2026-46492 (1)

Vendor Pages for CVE-2026-46492 (1)

IV. Related Vulnerabilities

Same vendor: commenthol
Same weakness: CWE-80

V. Comments for CVE-2026-46492

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