What’s Vulnerable › Vulnerabilities

CVE-2026-49492: Markdown Preview Enhanced OS Command Injection in External File and Link Opening

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-05 · updated 2026-10-26
• Weakness: CWE-78

Description

Markdown Preview Enhanced before 0.8.28 opens external files and links from the preview through a shell and does not validate untrusted inputs taken from the markdown document - the diagram filename attribute, imported file paths, and the latex_engine code-chunk attribute. On Windows, a crafted markdown document can inject operating system commands that execute when the document is previewed. Fixed in 0.8.28 by passing these inputs as literal arguments instead of through a shell and validating them before use.

Affected products

• shd101wyy Markdown Preview Enhanced: before 0.8.28 — fixed in 0.8.28

How to fix

Upgrade to a fixed version: shd101wyy Markdown Preview Enhanced 0.8.28. Check the vendor advisory for mitigations.

References

• https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.28
• https://www.vulncheck.com/advisories/markdown-preview-enhanced-os-command-injection-in-external-file-and-link-opening

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