CVE-2026-85622

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-04. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
5.3
EG Score
5.3(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

September 4, 2026

Last Modified

September 10, 2026

Advisory Details (4)

Auto-updated Sep 4, 2026
No patch confirmed yet.
generic

AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocket | Advisories | VulnCheck

https://www.vulncheck.com/advisories/appflowy-cloud-through-0.9.64-cross-workspace-collab-read-via-websocket
generic

AppFlowy-Cloud/src/api/ws.rs at 0.9.64 · AppFlowy-IO/AppFlowy-Cloud · GitHub

https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/ws.rs
generic

GitHub - AppFlowy-IO/AppFlowy-Cloud: Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative. · GitHub

https://github.com/AppFlowy-IO/AppFlowy-Cloud
generic

WebSocket realtime sync allows cross-workspace collab read; connection bind performs no membership check · Issue #1629 · AppFlowy-IO/AppFlowy-Cloud · GitHub

https://github.com/AppFlowy-IO/AppFlowy-Cloud/issues/1629

Vendor Advisories for CVE-2026-85622(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 58× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-25 02:05 UTCEG score recompute
  2. 2026-09-25 02:05 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 01:22 UTCGHSA enrichment
  5. 2026-09-23 00:41 UTCEG score recompute
  6. 2026-09-23 00:41 UTCGHSA enrichment
  7. 2026-09-22 16:01 UTCEPSS rescore
  8. 2026-09-21 23:58 UTCEG score recompute
  9. 2026-09-21 23:58 UTCGHSA enrichment
  10. 2026-09-21 21:09 UTCEPSS rescore
  11. 2026-09-20 23:17 UTCEG score recompute
  12. 2026-09-20 23:17 UTCGHSA enrichment
  13. 2026-09-20 20:16 UTCEPSS rescore
  14. 2026-09-19 22:19 UTCEG score recompute
  15. 2026-09-19 22:19 UTCGHSA enrichment
  16. 2026-09-18 21:34 UTCEG score recompute
  17. 2026-09-18 21:34 UTCGHSA enrichment
  18. 2026-09-18 19:28 UTCEPSS rescore
  19. 2026-09-17 20:53 UTCEG score recompute
  20. 2026-09-17 20:53 UTCGHSA enrichment
  21. 2026-09-17 19:32 UTCEPSS rescore
  22. 2026-09-16 20:11 UTCEG score recompute
  23. 2026-09-16 20:11 UTCGHSA enrichment
  24. 2026-09-16 14:09 UTCEPSS rescore
  25. 2026-09-16 05:15 UTCEPSS rescore
Show 33 more
  1. 2026-09-15 19:29 UTCEG score recompute
  2. 2026-09-15 19:29 UTCGHSA enrichment
  3. 2026-09-15 03:12 UTCEPSS rescore
  4. 2026-09-15 03:12 UTCEPSS rescore
  5. 2026-09-14 18:47 UTCGHSA enrichment
  6. 2026-09-13 18:05 UTCEG score recompute
  7. 2026-09-13 18:05 UTCGHSA enrichment
  8. 2026-09-12 17:23 UTCEG score recompute
  9. 2026-09-12 17:23 UTCGHSA enrichment
  10. 2026-09-11 16:41 UTCEG score recompute
  11. 2026-09-11 16:41 UTCGHSA enrichment
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-10 15:59 UTCEG score recompute
  15. 2026-09-10 15:59 UTCGHSA enrichment
  16. 2026-09-09 23:48 UTCGHSA enrichment
  17. 2026-09-08 23:05 UTCEG score recompute
  18. 2026-09-08 23:05 UTCGHSA enrichment
  19. 2026-09-08 22:01 UTCEPSS rescore
  20. 2026-09-07 18:38 UTCGHSA enrichment
  21. 2026-09-06 17:56 UTCEG score recompute
  22. 2026-09-06 17:56 UTCGHSA enrichment
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-05 17:14 UTCEG score recompute
  25. 2026-09-05 17:14 UTCGHSA enrichment
  26. 2026-09-05 15:31 UTCEPSS rescore
  27. 2026-09-04 16:30 UTCEG score recompute
  28. 2026-09-04 16:30 UTCGHSA enrichment
  29. 2026-09-04 15:45 UTCEG score recompute
  30. 2026-09-04 15:44 UTCGHSA enrichment
  31. 2026-09-04 15:25 UTCEG score recompute
  32. 2026-09-04 14:46 UTCEG score recompute
  33. 2026-09-04 14:44 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85622?
CVE-2026-85622 is a medium vulnerability published on September 4, 2026. AppFlowy-Cloud through 0.9.64 fails to validate workspace membership when establishing WebSocket connections in the establishwsconnection_v2 handler, allowing authenticated users to bind sessions to workspaces they do not belong to. Attackers can send sync Manifest messages with victim object…
When was CVE-2026-85622 disclosed?
CVE-2026-85622 was first published in the National Vulnerability Database on September 4, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85622 actively exploited?
CVE-2026-85622 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 69.1% of all scored CVEs.
What is the CVSS score of CVE-2026-85622?
CVE-2026-85622 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-85622?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85622, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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