Bluemonday operates on raw text, so characters like && and <> inside
markdown code blocks/inline code were being HTML-escaped (e.g. && → &&),
causing them to render incorrectly in the frontend.
Now extracts fenced code blocks and inline code spans before sanitization,
runs bluemonday on the remaining content, then restores the code verbatim.
* fix: sanitize markdown rendering in comments and shared renderers
Add rehype-sanitize to both ReadonlyContent and Markdown components so
that raw HTML parsed by rehype-raw is sanitized against a strict
allowlist before reaching the DOM. On the backend, add a bluemonday
sanitization pass when creating and updating comments to strip
dangerous tags as defense-in-depth.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
* fix: add mention:// protocol to sanitize allowlist and validate file card URLs
- Add mention:// to rehype-sanitize protocols.href in both ReadonlyContent
and Markdown so @mention links survive sanitization
- Validate data-href on file cards to only allow http(s) URLs, blocking
javascript: and data: schemes in both frontend click handler and backend
bluemonday policy
- Narrow class attribute allowlist to specific elements (code, div, span, pre)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
