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CVE-2026-85622— AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocket

Quick assessment

Affected
AppFlowy-IO AppFlowy-Cloud
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AppFlowy-Cloud 在版本 0.9.64 及之前版本中，在 处理程序建立 WebSocket 连接时，未验证工作区成员资格，导致已认证用户能够将会话绑定到他们所属之外的其他工作区。攻击者可以通过发送包含受害者对象标识符的同步 Manifest 消息，从而无需受害者参与即可读取其他工作区中协作内容里的完整文档或数据库状态。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1598.002 · Spearphishing Attachment

Affected Version Matrix 1

VendorProduct Version RangeStatus
AppFlowy-IO AppFlowy-Cloud ≤ 0.9.64 affected
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I. Basic Information for CVE-2026-85622

Vulnerability Information
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Vulnerability Title
AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocket
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AppFlowy-IO AppFlowy-Cloud 0 ~ 0.9.64 -

II. Public POCs for CVE-2026-85622

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III. Intelligence Information for CVE-2026-85622

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Vendor Advisories for CVE-2026-85622 (1)

Vendor Pages for CVE-2026-85622 (1)

Other References for CVE-2026-85622 (2)

IV. Related Vulnerabilities

Same product: AppFlowy-Cloud
Same vendor: AppFlowy-IO
Same weakness: CWE-863

V. Comments for CVE-2026-85622

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