CVE-2026-85622

AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocket

Published Sep 4, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Appflowy-io
Appflowy-io appflowy-cloud
Vendors & Products Appflowy-io
Appflowy-io appflowy-cloud
Type Values Removed Values Added
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.
Title AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocket
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 4, 2026, 3:40 PM
Reserved
Sep 4, 2026, 11:03 AM
Status
Deferred
Published
Sep 4, 2026, 3:17 PM
Modified
Sep 10, 2026, 3:53 PM