CVE-2026-85622: AppFlowy-Cloud workspace membership validation bypass in WebSocket connections

CVE-2026-85622 · Severity: medium · CVSS 5.3 · Published 2026-09-04

AppFlowy-Cloud is an open-source collaborative workspace platform for projects, wikis, and teams. Authenticated users can exploit a missing authorization check in WebSocket connection handling to access documents and databases from other workspaces without permission, allowing data exposure from confidential team collaborations.

Technologies: AppFlowy-IO AppFlowy-Cloud. Vendors: AppFlowy-IO.

Quick answers

Is CVE-2026-85622 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-85622 being exploited in the wild.
How severe is CVE-2026-85622?
Medium severity, with a CVSS score of 5.3, published 4 September 2026.
Which products and versions are affected?
AppFlowy-IO AppFlowy-Cloud through 0.9.64.
Is there a fix for CVE-2026-85622?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-85622 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-85622?
Check whether you run AppFlowy-IO AppFlowy-Cloud at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an authorization bypass in the establish_ws_connection_v2 WebSocket handler (src/api/ws.rs, v0.9.64 and earlier) that fails to validate whether an authenticated user belongs to a workspace before binding their session to it. An attacker with valid credentials can craft sync Manifest messages containing object identifiers from victim workspaces to read full document and database state. The attack requires authentication but no victim interaction; the attacker only needs to know or enumerate workspace and object identifiers. Patches should enforce workspace membership verification before allowing session binding.

Affected products

  • AppFlowy-IO AppFlowy-Cloud through 0.9.64

Timeline

  • 2026-09-04: disclosed: CVE-2026-85622 published
  • 2026-09-11: other: Repository archived by owner

References

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