Medium 5.3Published Sep 4, 2026

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

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects AppFlowy-IO AppFlowy-Cloud. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for AppFlowy-IO AppFlowy-Cloud

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

AppFlowy-IO AppFlowy-Cloud appflowy_io:appflowy_cloud (from the name)	through 0.9.64	CNA record

References

https://github.com/AppFlowy-IO/AppFlowy-Cloud/issues/1629issue-tracking
https://github.com/AppFlowy-IO/AppFlowy-Cloudproduct
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/ws.rstechnical-description
https://www.vulncheck.com/advisories/appflowy-cloud-through-0.9.64-cross-workspace-collab-read-via-websocketthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.