CVE-2026-85622

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

6.0 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.40%Up 0.1 points since Sep 5, 2026

What each source reports

CVE List Score used 6.0

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

Record: CVE-2026-85622
CVSS 4.0: 6.0 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-863
Updated: 2026-11-02

EUVDEUVD-2026-71229 6.0

Record: EUVD-2026-71229
CVSS 4.0: 6.0 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-gjxj-rv8r-wcp5 6.0

AppFlowy-Cloud through 0.9.64 fails to validate workspace membership when establishing WebSocket...

Record: GHSA-gjxj-rv8r-wcp5
CVSS 4.0: 6.0 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-863
Updated: 2026-11-02

NVD 6.0

Record: CVE-2026-85622
CVSS 4.0: 6.0 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-863
Updated: 2026-11-02

OSV 6.0

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

Record: CVE-2026-85622
CVSS 4.0: 6.0 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-863
Updated: 2026-11-02

Affected products

appflowy-io appflowy-cloud

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-85622 is a medium vulnerability (CVSS 6.0) in Appflowy-io Appflowy-cloud, published September 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.40%, the 33rd percentile. No source names a fixed version.