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Wed, 14 Oct 2026 21:30:00 +0000
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ssvc
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Wed, 14 Oct 2026 19:30:00 +0000
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| Description | 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. | |
| Title | Markdown Preview Enhanced: Remote Code Execution via VM Sandbox Escape in `.crossnote/config.js` and `.crossnote/parser.js` | |
| Weaknesses | CWE-94 | |
| References |
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| Metrics |
cvssV4_0
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Projects
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-10-14T19:45:22.736Z
Reserved: 2026-06-15T19:15:27.342Z
Link: CVE-2026-54566
Updated: 2026-10-14T19:45:05.683Z
Status : Received
Published: 2026-10-14T20:17:47.403
Modified: 2026-10-14T20:17:47.403
Link: CVE-2026-54566
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OpenCVE Enrichment
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