CVE-2026-55499

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner’s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets...

CVE-2026-55499 Cloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner’s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets...

EUVD-2026-51393

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner’s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets...

CVE-2026-55499 Cloudreve: Broken access control in file event stream leaks activity events for unshared siblings to single-file share recipients

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, a single-file share event-stream subscription resolves the share root to the owner’s parent folder and subscribes to that folder topic, allowing an authenticated share recipient to receive names, paths, rename targets...

CVE-2026-55499

CVE-2026-55499 (Cloudreve) Prior to version 4.17.0, an authenticated recipient of a single-file share can receive real-time events for files in the owner’s parent folder, not just the shared item. The mechanism subscribes to the owner’s parent ID for a single-file share root, and the event hub fa...

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...