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

Advisories

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

severity: high
date: 9/10/2026
Affecting: AppFlowy-Cloud >= 0.7.2, <= 0.9.64
CVE: CVE-2026-88898
CWE: CWE-862 Missing Authorization
CVSS: 7.1
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
References: AppFlowy-Cloud: bulk publish endpoint performs no workspace authorization
https://github.com/AppFlowy-IO/AppFlowy-Cloud
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/biz/workspace/publish.rs
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/workspace.rs
Credit: Michael Holmquist
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.

Ready to get Started?

Explore VulnCheck, a next-generation Cyber Threat Intelligence platform, which provides exploit and vulnerability intelligence to help you prioritize and remediate vulnerabilities that matter.

Vulnerability Prioritization
Prioritize vulnerabilities that matter based on the threat landscape and defer vulnerabilities that don't.
Early Warning System
Real-time alerting of changes in the vulnerability landscape so that you can take action before the attacks start.

Schedule a Demo