CVE-2026-49492Public exploitNetwork attack vectorHinoki check available

Command execution via shell-interpreted preview inputs

Published Jun 5, 2026 · Updated Jun 5, 2026

OS command injection in Markdown Preview Enhanced before 0.8.28 allows attackers to execute commands through a crafted markdown preview. The preview passes diagram filenames, imported file paths, and latex_engine values through a shell without validating them as literal arguments. Exploitation requires a Windows user to preview the crafted document, after which commands run with that user's VS Code privileges.

CVSS severity8.6
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in Markdown Preview Enhanced before 0.8.28 allows attackers to execute commands through a crafted markdown preview. The preview passes diagram filenames, imported file paths, and latex_engine values through a shell without validating them as literal arguments. Exploitation requires a Windows user to preview the crafted document, after which commands run with that user's VS Code privileges.

The record

CVE
CVE-2026-49492
Published
Jun 5, 2026
Updated
Jun 5, 2026
Vendor
shd101wyy
Product
Markdown Preview Enhanced
Classifications
CWE-78, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.8.28

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

shd101wyy · Markdown Preview Enhancedversion=0 <0.8.28

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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