What is CVE-2026-49492?

CVE-2026-49492 is a high-severity vulnerability in Shd101wyy Markdown Preview Enhanced, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-06-05.

How severe is CVE-2026-49492?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2026-49492 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Shd101wyy Markdown Preview Enhanced

CVE-2026-49492

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…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.003 (26.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Shd101wyy Markdown Preview Enhanced — versions 0

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

byte16384/CVE-2026-49492-PoC

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-49492?: CVE-2026-49492 is a high-severity vulnerability in Shd101wyy Markdown Preview Enhanced, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-06-05.
How severe is CVE-2026-49492?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-49492 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.