Please report vulnerabilities privately through GitHub security advisories. Do not open a public issue.
Include steps to reproduce and, where possible, a markdown sample that triggers the problem. You should get a response within a few days.
Only the latest version on main (deployed at mdfor.dev) is supported. Issues of particular interest:
- Script execution or HTML injection through rendered markdown, Mermaid diagrams, or KaTeX
- Bypasses of the Content Security Policy in
_headers - Anything that causes document content to leave the user's device