CVE-2026-54702 Markdown Preview Enhanced - Command Injection

Markdown Preview Enhanced < 0.8.30 contains a command injection caused by unvalidated attacker-controlled command and args in the webview message handler, letting attackers execute privileged extension commands, exploit requires prior webview JavaScript execution.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution, Data Tampering
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-749

Vendor fix

Update to version 0.8.30 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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