CVE Watch16 de out. de 2026

CVE-2026-54566

Markdown Preview Enhanced is a Markdown preview extension for Visual Studio Code. Prior to 0.8.29, Markdown Preview Enhanced evaluates repos

CVSS

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Sem CVSS

EPSS

0.3%

p22

KEV

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Exploit Today

0-100

Publicado: 14 de out. de 2026 · Última mod.: 16 de out. de 2026 · CWE-94

EPSS · 30d

0.3%EPSS · 30 dias0.3%

2026-10-152026-11-06

Descrição técnica

Markdown Preview Enhanced is a Markdown preview extension for Visual Studio Code. Prior to 0.8.29, Markdown Preview Enhanced evaluates repository-controlled .crossnote/config.js and .crossnote/parser.js files with vm.runInNewContext, which does not provide a security boundary from the Node.js host realm. Opening a Markdown file in a malicious repository automatically loads these files, and prototype-chain traversal can reach the host Function constructor and process object, allowing operating-system commands to execute as the victim account without further interaction. Both configuration evaluation and parser-hook evaluation are affected, and the attack does not depend on module-scoped require being available. This issue is fixed in version 0.8.29.

Referências oficiais

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