CVE-2026-49492: SHD101WYY Markdown Preview Enhanced

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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)

Published 2026-06-05. Last modified 2026-06-17.