CVE-2026-11422

Markdown Preview Enhanced 0.8.x with crossnote engine 0.9.28 contains a code injection vulnerability in the WaveDrom rendering pipeline that allows attackers to execute arbitrary JavaScript by embedding malicious content in a wavedrom fenced code block within a crafted Markdown document. Attackers can exploit the unsanitized passing of wavedrom block content to window.eval() in the VS Code webview context to abuse the extension's message passing and invoke arbitrary file writes on the local filesystem.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee
https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77
https://github.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315
https://www.vulncheck.com/advisories/markdown-preview-enhanced-x-code-injection-via-wavedrom-rendering
https://github.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315

Configurations

No configuration.

History

No history.

Information

Published : 2026-06-05 21:16

Updated : 2026-07-23 07:10

NVD link : CVE-2026-11422

Mitre link : CVE-2026-11422

CVE.ORG link : CVE-2026-11422

JSON object : View

Products Affected

No product.

CWE

CWE-95

Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

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Attackers can exploit the unsanitized passing of wavedrom block content to window.eval() in the VS Code webview context to abuse the extension's message passing and invoke arbitrary file writes on the local filesystem."}, {"lang": "es", "value": "Markdown Preview Enhanced 0.8.x con crossnote engine 0.9.28 contiene una vulnerabilidad de inyecci\u00f3n de c\u00f3digo en la tuber\u00eda de renderizado de WaveDrom que permite a los atacantes ejecutar JavaScript arbitrario incrustando contenido malicioso en un bloque de c\u00f3digo cercado de wavedrom dentro de un documento Markdown manipulado. Los atacantes pueden exploit la transferencia no saneada del contenido del bloque wavedrom a window.eval() en el contexto de la webview de VS Code para abusar del paso de mensajes de la extensi\u00f3n e invocar escrituras de archivos arbitrarias en el sistema de archivos local."}], "lastModified": "2026-07-23T07:10:00.113", "sourceIdentifier": "disclosure@vulncheck.com"}