Cloudreve: Broken Access Control in file event stream: a single-file share recipient is subscribed to the owner's parent folder and receives activity events for unshared siblings

Summary When an authenticated recipient of a single-file share opens the file event stream GET /api/v4/file/events?uri=, Cloudreve validates the URI by listing it and then subscribes the caller to parent.ID. For a single-file share, the share navigator resolves the bare share-root URI to the...

PT-2026-64434

Name of the Vulnerable Software and Affected Versions Cloudreve versions prior to 4.17.0 Description An authenticated recipient of a single-file share can access file-activity metadata for other files and folders located in the owner's parent folder that were not intended to be shared. This occur...