CVE-2026-19244

medium

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".

References

https://vuldb.com/vuln/386998/cti

https://vuldb.com/vuln/386998

https://vuldb.com/submit/865118

https://vuldb.com/submit/865116

https://vuldb.com/cve/CVE-2026-19244

https://github.com/HKUDS/nanobot/releases/tag/v0.3.0

https://github.com/HKUDS/nanobot/pull/4436

https://github.com/HKUDS/nanobot/issues/4435

https://github.com/HKUDS/nanobot/

https://gist.github.com/YLChen-007/3de5f50d167a878f7530f57ed018d508

Details

Source: Mitre, NVD

Published: 2026-08-07

Updated: 2026-08-07

Risk Information

CVSS v2

Base Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:M/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 4.7

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Severity: Medium

CVSS v4

Base Score: 5.1

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Severity: Medium