Executive brief
AppFlowy-Cloud is an open-source collaborative workspace platform for projects, wikis, and teams. Authenticated users can exploit a missing authorization check in WebSocket connection handling to access documents and databases from other workspaces without permission, allowing data exposure from confidential team collaborations.
Technical details
The vulnerability is an authorization bypass in the establish_ws_connection_v2 WebSocket handler (src/api/ws.rs, v0.9.64 and earlier) that fails to validate whether an authenticated user belongs to a workspace before binding their session to it. An attacker with valid credentials can craft sync Manifest messages containing object identifiers from victim workspaces to read full document and database state. The attack requires authentication but no victim interaction; the attacker only needs to know or enumerate workspace and object identifiers. Patches should enforce workspace membership verification before allowing session binding.
Affected products
- AppFlowy-IO AppFlowy-Cloud through 0.9.64
Timeline
- 2026-09-04: disclosed: CVE-2026-85622 published
- 2026-09-11: other: Repository archived by owner