The submit form's URL validation accepted any http/https host. Restrict it
to an explicit allowlist of official YouTube hosts using normalized,
exact hostname comparison (no substring/suffix matching), reject embedded
userinfo and malformed URLs, and add server-side length bounds for the URL,
submitter, note, and total request body.
The evidence gate on enqueue_download blocked every download, including a
URL that could only land in a slot store.reserve_download already proves is
empty and unguarded. After a Controller-only restart with the Player still
connected and idle, no fresh detailed status ever arrives, so this could
deadlock all new ingest indefinitely even though nothing unsafe would occur.
Narrow the gate to only require fresh evidence when the URL already occupies
a non-empty slot (refresh/reuse). Deletion, expiry, and cleanup/recovery
gating are unchanged.
Media