CVE WatchJul 23, 2026

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

CVSS

7.1

High

EPSS

0.2%

KEV

—

Exploit Today

0-100

Published: Jun 5, 2026 · Last modified: Jul 23, 2026 · CWE-95

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-07-032026-07-31

Technical description

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.

Official references

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