Vulnerability · Published Sep 10, 2026 · Assigned by VulnCheck

CVE-2026-88898AppFlowy-Cloud 0.7.2 through 0.9.64 Missing Workspace Authorization on Bulk Publish Endpoint

Medium 6.5

In plain English

A medium-severity missing authorization in AppFlowy-Cloud from AppFlowy-IO. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 66.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

AppFlowy-Cloud versions 0.7.2 through 0.9.64 fail to authorize callers against the workspace in the bulk publish endpoint path, allowing authenticated users to publish content into other tenants' namespaces. Attackers can write published views with attacker-controlled title, body and metadata into victim workspaces to deface public pages or host phishing content on trusted URLs.

Affected products (as reported)

Vendor	Product	Versions
AppFlowy-IO	AppFlowy-Cloud	0.7.2 – through 0.9.64

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

References

AppFlowy-Cloud: bulk publish endpoint performs no workspace authorization technical-description, exploit
https://github.com/AppFlowy-IO/AppFlowy-Cloud product
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/biz/workspace/publish.rs technical-description
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/workspace.rs technical-description
VulnCheck Advisory: AppFlowy-Cloud 0.7.2 through 0.9.64 Missing Workspace Authorization on Bulk Publish Endpoint third-party-advisory