CVE-2026-11422

HIGH EPSS 5.5%
Published Jun 5, 20263w ago · Modified Jun 17, 20261w ago
8.4 CVSS 4.0
High
Find Similar
Published Jun 5, 2026 3w ago
Last Modified Jun 17, 2026 1w ago

Description

Markdown Preview Enhanced 0.8.x with crossnote engine 0.9.28 contains a code injection vulnerability in the WaveDrom rendering pipeline that allows attackers to execute arbitrary JavaScript by embedding malicious content in a wavedrom fenced code block within a crafted Markdown document. Attackers can exploit the unsanitized passing of wavedrom block content to window.eval() in the VS Code webview context to abuse the extension's message passing and invoke arbitrary file writes on the local filesystem.

CVSS Details

Base Score
8.4
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/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
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
5.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-95

References 4

  • github.com https://github.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91ee
  • github.com https://github.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77
  • github.com https://github.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315
  • vulncheck.com https://www.vulncheck.com/advisories/markdown-preview-enhanced-x-code-injection-via-wavedrom-rendering

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.