AppFlowy-IO AppFlowy-Cloud up to 0.9.64 WebSocket Connection establish_ws_connection_v2 improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, was found in AppFlowy-IO AppFlowy-Cloud up to 0.9.64. This issue affects the function establish_ws_connection_v2 of the component WebSocket Connection Handler. The manipulation results in improper authorization. This vulnerability is known as CVE-2026-85622. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in AppFlowy-IO AppFlowy-Cloud up to 0.9.64. Affected is the function establish_ws_connection_v2 of the component WebSocket Connection Handler. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-85622 since 09/04/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/04/2026). The MITRE ATT&CK project declares the attack technique as T1548.002.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Cloud Software

Vendor

• AppFlowy-IO

Name

• AppFlowy-Cloud

Version

• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3
• 0.9.4
• 0.9.5
• 0.9.6
• 0.9.7
• 0.9.8
• 0.9.9
• 0.9.10
• 0.9.11
• 0.9.12
• 0.9.13
• 0.9.14
• 0.9.15
• 0.9.16
• 0.9.17
• 0.9.18
• 0.9.19
• 0.9.20
• 0.9.21
• 0.9.22
• 0.9.23
• 0.9.24
• 0.9.25
• 0.9.26
• 0.9.27
• 0.9.28
• 0.9.29
• 0.9.30
• 0.9.31
• 0.9.32
• 0.9.33
• 0.9.34
• 0.9.35
• 0.9.36
• 0.9.37
• 0.9.38
• 0.9.39
• 0.9.40
• 0.9.41
• 0.9.42
• 0.9.43
• 0.9.44
• 0.9.45
• 0.9.46
• 0.9.47
• 0.9.48
• 0.9.49
• 0.9.50
• 0.9.51
• 0.9.52
• 0.9.53
• 0.9.54
• 0.9.55
• 0.9.56
• 0.9.57
• 0.9.58
• 0.9.59
• 0.9.60
• 0.9.61
• 0.9.62
• 0.9.63
• 0.9.64

Website

• Product: https://github.com/AppFlowy-IO/AppFlowy-Cloud/

CPE 2.3info

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