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CVE-2026-11422

7.1 · HIGH

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 embe…

Published Jun 5, 2026CWE-95EPSS 0.16%

Overview

CVE-2026-11422 is a high-severity vulnerability. It was published on June 5, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/shd101wyy/crossnote/commit/5588ca2121c3da43fe331575dc5cf4ef347b91eeGitHubgithub.com/shd101wyy/vscode-markdown-preview-enhanced/commit/dcd80281c986293b93d9f1af34ced64dcb230c77GitHubgithub.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315Refwww.vulncheck.com/advisories/markdown-preview-enhanced-x-code-injection-via-wavedrom-renderingGitHubgithub.com/shd101wyy/vscode-markdown-preview-enhanced/issues/2315

How CyberStrike helps

Frequently asked questions

What is CVE-2026-11422?

CVE-2026-11422 is a high-severity vulnerability. It was published on June 5, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-11422?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-11422?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-11422?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-11422 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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