High severity · published Jun 5, 2026
CVE-2026-49492
Markdown Preview Enhanced OS Command Injection in External File and Link Opening
8.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MP
Markdown Preview Enhanced · shd101wyy
before 0.8.28 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49492
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49492
github.com
https://github.com/shd101wyy/vscode-markdown-preview-enhanced/releases/tag/0.8.28
www.vulncheck.com
https://www.vulncheck.com/advisories/markdown-preview-enhanced-os-command-injection-in-external-file-and-link-opening
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