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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
shd101wyy Markdown Preview Enhanced affected
Version Status Constraints
0 affected < 0.8.28

No data.

No data.

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Project Subscriptions

Vendors Products
Markdown Preview Enhanced Project Subscribe
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.28 cve-icon cve-icon
https://www.vulncheck.com/advisories/markdown-preview-enhanced-os-command-injection-in-external-file-and-link-opening cve-icon cve-icon
History

Fri, 05 Jun 2026 18:15:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-06-05T17:49:52.057Z

Reserved: 2026-05-31T11:54:34.993Z

Link: CVE-2026-49492

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-06-05T18:17:33.377

Modified: 2026-06-05T18:59:54.823

Link: CVE-2026-49492

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-05T20:15:09Z

Weaknesses