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wyucandwyuc
0bab621e09
* harden input validation and outbound URL handling - Validate the classroom id on the write path with the same allowlist the read path already applies, and assert in the storage layer that a resolved classroom file stays inside CLASSROOMS_DIR. - Apply validateUrlForSSRF at every call site regardless of NODE_ENV; the guard already owns the ALLOW_LOCAL_NETWORKS escape hatch, so the extra environment condition only disabled the check outside production builds. Add a repository-scanning test so a gated call site cannot reappear. - Re-validate every redirect hop of an outbound provider request through a shared transport, mirroring the per-hop loop proxy-media already uses. - Restrict stored slide HTML to the formatting vocabulary the renderer produces, sanitizing at the classroom persistence boundary on both write and read, with a separate policy for KaTeX snapshots. - Refuse the development persistence authenticator under NODE_ENV=production unless an explicit opt-in is set, and document it in .env.example. * drop credential headers on a cross-origin redirect hop The manual redirect loop reused the caller's init on every hop, so provider credentials were re-sent to the redirect target even on a different origin. The platform fetch drops Authorization itself when it follows redirects, so mirror that: strip authorization, api-key, x-api-key and x-goog-api-key before a cross-origin hop, matching case-insensitively and preserving the shape of the caller's headers. Same-origin hops are untouched. A streaming request body cannot be replayed onto the next hop, so fail with a clear message rather than sending an empty body. --------- Co-authored-by: wyuc <dhq1024@proton.me>