CVE-2026-19244 HKUDS nanobot MCP enabledTools Scope mcp.py connect_mcp_servers access control
Attackers can bypass MCP enabledTools scope restrictions to access unauthorized resources or prompts in HKUDS nanobot.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19244?
CVE-2026-19244 is a medium-severity missing authorization vulnerability in HKUDS nanobot, published on 7 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A vulnerability was detected in HKUDS nanobot up to 0.2.1. The affected element is the function connect_mcp_servers of the file nanobot/agent/tools/mcp.py of the component MCP enabledTools Scope Handler. Performing a manipulation results in improper access controls. The attack is possible to be carried out remotely. The exploit is now public and may be used. Upgrading to version 0.3.0 is sufficient to fix this issue. The patch is named 4436. You should upgrade the affected component. Multiple issues were reported to the project. They reacted with a high level of professionalism and kindness: "Both reports describe the same root cause: MCP resource and prompt wrappers could be registered outside the intended enabledTools scope. The registration boundary was corrected".
Which versions are affected by CVE-2026-19244?
How do I fix CVE-2026-19244?
No fix has been published for CVE-2026-19244 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-19244 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19244 exists.
Sources
Also known as GHSA-qwp6-wxvx-2jc8.