Medium severity5.3NVD Advisory· Published Sep 4, 2026· Updated Sep 4, 2026

CVE-2026-85622

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.

Affected products

AppFlowy/AppFlowyllm-fuzzy
Range: <=0.9.64

Patches

Vulnerability mechanics

References

github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/ws.rsnvd
github.com/AppFlowy-IO/AppFlowy-Cloud/issues/1629nvd
www.vulncheck.com/advisories/appflowy-cloud-through-0.9.64-cross-workspace-collab-read-via-websocketnvd

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cvss	0.345
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000