Files
TREK/server
Maurice f23de88b74 fix(packing): authorize every single-item path against the item, not just the trip
A packing item is Common, Personal or Shared with named recipients. listItems()
always applied that rule, but every path that touches one item resolved it by
trip id alone, so trip membership plus packing_edit was enough to reach an item
the member could not see. Update, delete, clone, the contributor routes and the
sharing route all shared the lookup, and the same service methods sit behind the
MCP tools and the plugin RPC, so all three transports carried the gap.

The update was a read as well: it answered with the enriched row, which hands
back the name, category, quantity, weight, the owner's username and the recipient
list of an item the caller was never shown.

Two flows laundered restricted items into places they do not belong. Saving a
trip as a template read every row in the trip, so a template captured the names
and categories of everyone's Personal items. Copying a trip did the same and
re-inserted without is_private/owner_id, so both fell back to the column defaults
and another member's Personal or Shared item reappeared in the copy as a Common
item. That path needs only trip_create and trip access, not even packing_edit.

There is now one visibility rule in the service and every single-item lookup goes
through it. The actor is threaded through the HTTP, MCP and plugin-RPC entry
points, and a missing actor denies rather than falling through unfiltered. An
item the actor may not see is reported as missing, not as forbidden, so the
routes cannot be used to confirm that an id exists.

Two deliberate contract changes fall out of that. The sharing route answers 404
instead of 403 when the caller cannot see the item at all; a visible item they do
not own still answers 403. And a template or a trip copy now carries the Common
list plus the actor's own items, with a restricted item staying restricted and
owned by the copier.

Reported privately by Chichi (@vickyzer027-hash).
2026-08-14 22:09:21 +02:00
..
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