Medium severity · published Sep 10, 2026
CVE-2026-88898
AppFlowy-Cloud 0.7.2 through 0.9.64 Missing Workspace Authorization on Bulk Publish Endpoint
6.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AP
AppFlowy-Cloud · AppFlowy-IO
0.7.2 through 0.9.64 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88898
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88898
gist.github.com
https://gist.github.com/mtholmquist/ab550712a4628c7c7c4705bceccd93b3
github.com
https://github.com/AppFlowy-IO/AppFlowy-Cloud
github.com
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/api/workspace.rs
github.com
https://github.com/AppFlowy-IO/AppFlowy-Cloud/blob/0.9.64/src/biz/workspace/publish.rs
www.vulncheck.com
https://www.vulncheck.com/advisories/appflowy-cloud-0.7.2-through-0.9.64-missing-workspace-authorization-on-bulk-publish-endpoint
More from AppFlowy-Cloud
7.5
CVE-2026-85619
AppFlowy-Cloud 0.9.64 Cross-Workspace Collab Access via HTTP API
7.1
CVE-2026-16007
Authenticated SQL Injection in AppFlowy
5.3
CVE-2026-85622
AppFlowy-Cloud through 0.9.64 Cross-Workspace Collab Read via WebSocket