CVE-2026-54701mediumCWE-79

CVE-2026-54701: fallo de gravedad media en shd101wyy vscode-markdown-preview-enhanced

Markdown Preview Enhanced: Stored XSS via Unsanitized `.crossnote/head.html` Injection in Webview

Publicada el

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 6.9epss 0.2%
probabilidad de explotación
0.2%top 90% de las CVE
explotación observada
noninguna fuente lo reporta
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.
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
Productos afectados
shd101wyy · vscode-markdown-preview-enhanced
CVEs relacionadas — shd101wyy vscode-markdown-preview-enhanced

En el mismo producto, de las más peligrosas a las menos.

CVE-2026-54525HIGHMarkdown Preview Enhanced: One Click RCE via Markdown Link Command Injection on WindowsEPSS 0.4%CVE-2026-54566HIGHMarkdown Preview Enhanced: Remote Code Execution via VM Sandbox Escape in `.crossnote/config.js` and `.crossnote/parser.js`EPSS 0.3%CVE-2026-54702HIGHMarkdown Preview Enhanced: Blind Command Dispatch via Unvalidated Webview Message HandlerEPSS 0.2%CVE-2026-54703MEDIUMMarkdown Preview Enhanced: Arbitrary File Write via updateMarkdown Command Without Path ValidationEPSS 0.2%
Referencias
https://github.com/shd101wyy/crossnote/commit/8c55a2ba3365712a1caa4abeece0383bc2994d48https://github.com/shd101wyy/crossnote/pull/444https://github.com/shd101wyy/crossnote/releases/tag/0.9.31https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/8bc848b6cbb42b9f35a0f95f7c3bf29b8302970ehttps://github.com/shd101wyy/vscode-markdown-preview-enhanced/pull/2323https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.30https://github.com/shd101wyy/vscode-markdown-preview-enhanced/security/advisories/GHSA-mcwg-4j78-qwv3