CVE-2026-19244: Improper Access Controls in HKUDS nanobot
CVE-2026-19244 is a medium severity vulnerability in HKUDS nanobot versions 0.2.0 and 0.2.1. It involves improper access controls in the connect_mcp_servers function within the MCP enabledTools Scope Handler component. The vulnerability allows remote attackers to manipulate the system due to incorrect registration boundaries of MCP resource and prompt wrappers. The issue is fixed in version 0.3.0.
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
CVE-2026-19244 is a medium severity vulnerability in HKUDS nanobot versions 0.2.0 and 0.2.1. It involves improper access controls in the connect_mcp_servers function within the MCP enabledTools Scope Handler component. The vulnerability allows remote attackers to manipulate the system due to incorrect registration boundaries of MCP resource and prompt wrappers. The issue is fixed in version 0.3.0.
CVSS v4.0
Score 5.1medium
Affected software
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
- Remediation Level
- null
Threat ID: 6a76468dbf8831d53924fd7f
Added to database: 08/07/2026, 20:56:45 UTC
Last enriched: 08/07/2026, 21:14:43 UTC
Last updated: 08/07/2026, 21:14:43 UTC
Views: 2
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