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

> Authenticated users can publish malicious content to other tenants' workspaces due to missing authorization checks on the bulk publish endpoint.

- **Severity:** High 7.1 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Sep 2026
- **Updated:** 10 Sep 2026
- **Also known as:** GHSA-8p2p-fv97-r9ww

## What is CVE-2026-88898?

CVE-2026-88898 is a high-severity missing authorization vulnerability in AppFlowy-IO AppFlowy-Cloud, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### 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.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-88898?


## How do I fix CVE-2026-88898?

No fix has been published for CVE-2026-88898 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-88898 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88898 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-88898 and fix it if it is affected.

What it is: CVE-2026-88898 is a high-severity missing authorization vulnerability in AppFlowy-IO AppFlowy-Cloud, published on 10 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88898 exists.

Affected product: AppFlowy-IO AppFlowy-Cloud. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-88898/ (Markdown: https://insights.sbomify.com/CVE-2026-88898/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-88898
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-88898
- OSV: https://osv.dev/vulnerability/CVE-2026-88898

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-88898/
Summaries are generated and may contain mistakes; the official description above is the record.