CVE-2026-49492

Markdown Preview Enhanced OS Command Injection in External File and Link Opening

Published Jun 5, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Shd101wyy
Shd101wyy markdown Preview Enhanced
Vendors & Products Shd101wyy
Shd101wyy markdown Preview Enhanced
Type Values Removed Values Added
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.
Title Markdown Preview Enhanced OS Command Injection in External File and Link Opening
First Time appeared Markdown Preview Enhanced Project
Markdown Preview Enhanced Project markdown Preview Enhanced
Weaknesses CWE-78
CPEs cpe:2.3:a:markdown_preview_enhanced_project:markdown_preview_enhanced:*:*:*:*:*:*:*:*
Vendors & Products Markdown Preview Enhanced Project
Markdown Preview Enhanced Project markdown Preview Enhanced
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.6, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 8, 2026, 2:04 PM
Reserved
May 31, 2026, 11:54 AM
Status
Deferred
Published
Jun 5, 2026, 6:17 PM
Modified
Oct 26, 2026, 11:10 AM