Home

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.

PUBLISHED Reserved 2026-05-31 | Published 2026-06-05 | Updated 2026-06-08 | Assigner VulnCheck




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

Problem types

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

Any version before 0.8.28
affected

Credits

byte16384 finder

References

github.com/...-markdown-preview-enhanced/releases/tag/0.8.28 (Release 0.8.28) release-notes

www.vulncheck.com/...ction-in-external-file-and-link-opening (VulnCheck Advisory: Markdown Preview Enhanced OS Command Injection in External File and Link Opening) third-party-advisory

cve.org (CVE-2026-49492)

nvd.nist.gov (CVE-2026-49492)

Download JSON