CVE-2026-19244: Improper Access Controls in HKUDS nanobot
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".
AI Analysis
Technical Summary
The vulnerability in HKUDS nanobot up to version 0.2.1 is caused by improper access controls in the connect_mcp_servers function of nanobot/agent/tools/mcp.py. Specifically, MCP resource and prompt wrappers could be registered outside the intended enabledTools scope, leading to unauthorized access. This flaw can be exploited remotely. The project addressed this by correcting the registration boundary, and upgrading to version 0.3.0 resolves the issue. The patch is identified as 4436.
Potential Impact
An attacker can remotely exploit this vulnerability to bypass intended access controls due to improper registration boundaries in the MCP component. This could lead to unauthorized actions within the affected system. The CVSS 4.0 base score is 5.1 (medium severity), reflecting network attack vector, low complexity, no user interaction, and partial impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade HKUDS nanobot to version 0.3.0 or later, which includes the fix for this vulnerability by correcting the MCP resource and prompt wrapper registration boundaries. Applying this upgrade fully mitigates the issue.
CVE-2026-19244: Improper Access Controls in HKUDS nanobot
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".
CVSS v4.0
Score 5.1medium
Affected software
HKUDS
nanobot
cpe:2.3:a:nanobot:nanobot:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in HKUDS nanobot up to version 0.2.1 is caused by improper access controls in the connect_mcp_servers function of nanobot/agent/tools/mcp.py. Specifically, MCP resource and prompt wrappers could be registered outside the intended enabledTools scope, leading to unauthorized access. This flaw can be exploited remotely. The project addressed this by correcting the registration boundary, and upgrading to version 0.3.0 resolves the issue. The patch is identified as 4436.
Potential Impact
An attacker can remotely exploit this vulnerability to bypass intended access controls due to improper registration boundaries in the MCP component. This could lead to unauthorized actions within the affected system. The CVSS 4.0 base score is 5.1 (medium severity), reflecting network attack vector, low complexity, no user interaction, and partial impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade HKUDS nanobot to version 0.3.0 or later, which includes the fix for this vulnerability by correcting the MCP resource and prompt wrapper registration boundaries. Applying this upgrade fully mitigates the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-07T12:07:04.739Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a76468dbf8831d53924fd7f
Added to database: 08/07/2026, 20:56:45 UTC
Last enriched: 08/07/2026, 21:14:43 UTC
Last updated: 09/21/2026, 22:01:32 UTC
Views: 75
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