Auth bypass in Appflowy-Io Appflowy-Cloud
CVE-2026-85619
AppFlowy-Cloud 0.9.64 fails to verify that requested collab objects belong to the workspace in authorization checks, allowing attackers to access documents and database rows across workspaces. Attackers can supply a victim's object ID with their own workspace ID to bypass access controls and read, modify, or delete cross-workspace data.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.006 · change: +0.000
Affected products
Weakness classification (CWE)
References
- github.com/AppFlowy-IO/AppFlowy-Cloud (product)
- github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/libs/access-control/src/casbi… (technical-description)
- github.com/AppFlowy-IO/AppFlowy-Cloud/issues/1624 (issue-tracking)
- www.vulncheck.com/advisories/appflowy-cloud-0.9.64-cross-workspace-collab-acces… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-85619?
- CVE-2026-85619 is a high-severity vulnerability in Appflowy-Io Appflowy-Cloud, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-09-04.
- How severe is CVE-2026-85619?
- High severity. CVSS v3 base score is 7.5 out of 10.