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.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-108856 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108856 exists.
Sources
Also known as GHSA-5pv8-92g5-57vm.