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Security policy

Reporting a vulnerability

If you've found a security issue in md2any, please don't open a public issue. Instead:

  1. Open a private security advisory on GitHub.
  2. Include a minimal reproduction (input markdown that causes the issue, the exact command line, and the unexpected behaviour).
  3. We will acknowledge within 7 days and aim to ship a fix within 30 days for confirmed vulnerabilities.

Threat model

md2any reads markdown files and writes Office/OpenDocument/PDF files. The most plausible security boundaries are:

  • Untrusted input markdown — md2any parses markdown and embeds local image files. If md2any is run on an untrusted markdown file, the input can reference arbitrary local paths via ![alt](path) or <!-- bg: path -->. The file's contents will be embedded in the output document. Don't run md2any on untrusted input against a file system with secrets.

  • Shell-out to diagram tools — When a code fence is tagged dot, mermaid, or plantuml, md2any shells out to the matching CLI tool with the fence contents as input. If you don't trust the source markdown, consider these inputs the same as running the diagram tool directly on attacker-controlled input.

  • Generated output files — md2any writes only to the path passed via -o (or derived from the input filename). It does not create files elsewhere on the file system.

Supported versions

Only the latest released version receives security fixes. md2any uses semantic versioning; patch releases (0.1.x) are backwards-compatible bug fixes including security fixes.