CVE-2026-49492 HIGH

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

Vendor Shd101Wyy
Product Markdown Preview Enhanced
Weakness CWE-78
Published June 5, 2026
Last update June 8, 2026

CVSS base score

8.6/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 5, 2026 CVE published
June 8, 2026 Record updated