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CVE-2026-54701— Markdown Preview Enhanced: Stored XSS via Unsanitized `.crossnote/head.html` Injection in Webview

一分钟漏洞结论

影响对象
shd101wyy vscode-markdown-preview-enhanced
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Markdown Preview Enhanced is a Markdown preview extension for Visual Studio Code. Prior to 0.8.30, Markdown Preview Enhanced reads repository-controlled .crossnote/head.html content and passes it through resolvePathsInHeader before inserting it into the head o

CVSS 6.9 · Medium

影响版本矩阵 1

厂商产品 版本范围状态
shd101wyy vscode-markdown-preview-enhanced < 0.8.30 affected
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一、 漏洞 CVE-2026-54701 基础信息

漏洞信息

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Vulnerability Title
Markdown Preview Enhanced: Stored XSS via Unsanitized `.crossnote/head.html` Injection in Webview
来源: CVE Program / CVE List V5
Vulnerability Description
Markdown Preview Enhanced is a Markdown preview extension for Visual Studio Code. Prior to 0.8.30, Markdown Preview Enhanced reads repository-controlled .crossnote/head.html content and passes it through resolvePathsInHeader before inserting it into the head of the preview webview document without removing executable content. Script-capable markup executes while the document loads, before the React application and DOMPurify initialize, and can access acquireVsCodeApi to send messages from the webview to the extension host. Opening a Markdown preview in a malicious repository is sufficient to trigger the injected content, and no additional click within the notification or preview is required. This issue is fixed in version 0.8.30.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
shd101wyy vscode-markdown-preview-enhanced < 0.8.30 -

二、漏洞 CVE-2026-54701 的公开POC

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三、漏洞 CVE-2026-54701 的情报信息

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CVE-2026-54701 其他参考 (7)

同批安全公告 · shd101wyy · 2026-10-14 · 共 5 条

CVE-2026-54525 8.8 HIGH Markdown Preview Enhanced: One Click RCE via Markdown Link Command Injection on Windows
CVE-2026-54566 8.5 HIGH Markdown Preview Enhanced: Remote Code Execution via VM Sandbox Escape in `.crossnote/conf
CVE-2026-54702 7.3 HIGH Markdown Preview Enhanced: Blind Command Dispatch via Unvalidated Webview Message Handler
CVE-2026-54703 5.8 MEDIUM Markdown Preview Enhanced: Arbitrary File Write via updateMarkdown Command Without Path Va

IV. Related Vulnerabilities

Same product: vscode-markdown-preview-enhanced
Same vendor: shd101wyy
Same weakness: CWE-79

V. Comments for CVE-2026-54701

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