# CVE-2026-108856: UnicomAI Wanwu through 0.6.5 Authorization Bypass via /v1/appspace/app/key AppKey Minting

> Authenticated users can mint AppKeys for other users' MCP servers, allowing unauthorized access to victim tools and data.

- **Severity:** Low 2.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/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:** 11 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-5pv8-92g5-57vm

## What is CVE-2026-108856?

CVE-2026-108856 is a low-severity authentication bypass vulnerability in UnicomAI Wanwu, published on 11 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

UnicomAI Wanwu through 0.6.5 contains an authorization bypass vulnerability that allows authenticated users to mint AppKeys bound to other users' MCP servers via POST /v1/appspace/app/key. Attackers supplying a victim's MCP server UUID with appType mcpserver can open MCP sessions and invoke the server's tools using the victim's upstream authentication.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-108856?


## How do I fix CVE-2026-108856?

No fix has been published for CVE-2026-108856 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108856 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108856 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108856 and fix it if it is affected.

What it is: CVE-2026-108856 is a low-severity authentication bypass vulnerability in UnicomAI Wanwu, published on 11 Oct 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-2026-108856 exists.

Affected product: UnicomAI Wanwu. 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-2026-108856/ (Markdown: https://insights.sbomify.com/CVE-2026-108856/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108856
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108856
- OSV: https://osv.dev/vulnerability/CVE-2026-108856

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108856/
Summaries are generated and may contain mistakes; the official description above is the record.