Vulnerability-Lookup

CVE-2026-85622 (GCVE-0-2026-85622)

Vulnerability from cvelistv5 – Published: 2026-09-04 14:32 – Updated: 2026-09-04 15:40

Title

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

Summary

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.

Severity

6 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-04 15:39 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/AppFlowy-IO/AppFlowy-Cloud/iss…	issue-tracking
https://github.com/AppFlowy-IO/AppFlowy-Cloud	product
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blo…	technical-description
https://www.vulncheck.com/advisories/appflowy-clo…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
AppFlowy-IO	AppFlowy-Cloud	Affected: 0 , ≤ 0.9.64 (custom)	guessed

Date Public

2026-07-08 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-85622

Vulnerability from fkie_nvd - Published: 2026-09-04 15:17 - Updated: 2026-09-04 16:18

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/AppFlowy-IO/AppFlowy-Cloud
	disclosure@vulncheck.com	https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/ws.rs
	disclosure@vulncheck.com	https://github.com/AppFlowy-IO/AppFlowy-Cloud/issues/1629
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/appflowy-cloud-through-0.9.64-cross-workspace-collab-read-via-websocket

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "affected": [
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      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "AppFlowy-Cloud",
          "vendor": "AppFlowy-IO",
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  ],
  "id": "CVE-2026-85622",
  "lastModified": "2026-09-04T16:18:20.110",
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      "description": [
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          "lang": "en",
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}

GHSA-GJXJ-RV8R-WCP5

Vulnerability from github – Published: 2026-09-04 15:36 – Updated: 2026-09-04 15:36

Details

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

6.0 (Medium)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-85622"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-04T15:17:42Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-gjxj-rv8r-wcp5",
  "modified": "2026-09-04T15:36:13Z",
  "published": "2026-09-04T15:36:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85622"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AppFlowy-IO/AppFlowy-Cloud/issues/1629"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AppFlowy-IO/AppFlowy-Cloud"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/ws.rs"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/appflowy-cloud-through-0.9.64-cross-workspace-collab-read-via-websocket"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS: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",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-85622 (GCVE-0-2026-85622)

FKIE_CVE-2026-85622

GHSA-GJXJ-RV8R-WCP5

Tags

Sightings

Nomenclature