CVE-2026-85622
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductAppFlowy-Cloud
PublishedSep 4, 2026
First seenSep 4, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| AppFlowy-IO AppFlowy-Cloud | v ≤ 0.9.64 | — |
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