CVE-2026-19244 (GCVE-0-2026-19244)
Vulnerability from cvelistv5 – Published: 2026-08-07 20:30 – Updated: 2026-08-07 21:01
VLAI
EPSS
VEX
Title
HKUDS nanobot MCP enabledTools Scope mcp.py connect_mcp_servers access control
Summary
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".
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/386998 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/386998/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-19244 | third-party-advisory |
| https://vuldb.com/submit/865116 | third-party-advisory |
| https://vuldb.com/submit/865118 | third-party-advisory |
| https://github.com/HKUDS/nanobot/issues/4435 | issue-tracking |
| https://gist.github.com/YLChen-007/3de5f50d167a87… | exploit |
| https://github.com/HKUDS/nanobot/pull/4436 | issue-trackingpatch |
| https://github.com/HKUDS/nanobot/releases/tag/v0.3.0 | patch |
| https://github.com/HKUDS/nanobot/ | product |
Impacted products
Credits
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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