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".

Attack Vector Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Multiple

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
HKUDS nanobot affected
Version Status Constraints
0.2.0 affected —
0.2.1 affected —
0.3.0 unaffected —

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Project Subscriptions

Vendors Products
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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://gist.github.com/YLChen-007/3de5f50d167a878f7530f57ed018d508 cve-icon
https://github.com/HKUDS/nanobot/ cve-icon
https://github.com/HKUDS/nanobot/issues/4435 cve-icon
https://github.com/HKUDS/nanobot/pull/4436 cve-icon
https://github.com/HKUDS/nanobot/releases/tag/v0.3.0 cve-icon
https://vuldb.com/cve/CVE-2026-19244 cve-icon
https://vuldb.com/submit/865116 cve-icon
https://vuldb.com/submit/865118 cve-icon
https://vuldb.com/vuln/386998 cve-icon
https://vuldb.com/vuln/386998/cti cve-icon
History

Fri, 07 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
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".
Title HKUDS nanobot MCP enabledTools Scope mcp.py connect_mcp_servers access control
First Time appeared Nanobot
Nanobot nanobot
Weaknesses CWE-266
CWE-284
CPEs cpe:2.3:a:nanobot:nanobot:*:*:*:*:*:*:*:*
Vendors & Products Nanobot
Nanobot nanobot
References
Metrics cvssV2_0

{'score': 5.8, 'vector': 'AV:N/AC:L/Au:M/C:P/I:P/A:P/E:POC/RL:OF/RC:C'}

cvssV3_0

{'score': 4.7, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C'}

cvssV4_0

{'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/E:P'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-08-07T20:30:13.889Z

Reserved: 2026-08-07T12:07:04.739Z

Link: CVE-2026-19244

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses