CVE-2026-85622
AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocket
- State
- Published
- Severity
- 6.0 Medium
- Published
- Sep 4, 2026
- Updated
- Sep 4, 2026
- Reserved
- Sep 4, 2026
Description
AppFlowy-Cloud through 0.9.64 fails to validate workspace membership when establishing WebSocket connections in the establish_ws_connection_v2 handler, allowing authenticated users to bind sessions to workspaces they do not belong to. Attackers can send sync Manifest messages with victim object identifiers to read full document or database state from collaborations in other workspaces without victim involvement.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.0 Medium | CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N | VulnCheck |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
AppFlowy-CloudAppFlowy-IO |
|
References
- GitHub Issue #1629issue-tracking
- https://github.com/AppFlowy-IO/AppFlowy-Cloudproduct
- https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/ws.rstechnical-description
- VulnCheck Advisory: AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocketthird-party-advisory
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