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GHSA-QWP6-WXVX-2JC8

Vulnerability from github – Published: 2026-08-07 21:30 – Updated: 2026-08-07 21:30

Details

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

4.7 (Medium)


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

2.0 (Low)


                  
                    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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-19244"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-266"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-07T21:17:27Z",
    "severity": "LOW"
  },
  "details": "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\".",
  "id": "GHSA-qwp6-wxvx-2jc8",
  "modified": "2026-08-07T21:30:39Z",
  "published": "2026-08-07T21:30:39Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19244"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot/issues/4435"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot/pull/4436"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/YLChen-007/3de5f50d167a878f7530f57ed018d508"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot"
    },
    {
      "type": "WEB",
      "url": "https://github.com/HKUDS/nanobot/releases/tag/v0.3.0"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-19244"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/865116"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/865118"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386998"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386998/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-19244 (GCVE-0-2026-19244)

Vulnerability from cvelistv5 – Published: 2026-08-07 20:30 – Updated: 2026-08-07 21:01

Title

HKUDS nanobot MCP enabledTools Scope mcp.py connect_mcp_servers access control

Summary

Severity

5.1 (Medium)


                        
                          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

4.7 (Medium)


                        
                          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

4.7 (Medium)


                        
                          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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-284 - Improper Access Controls
CWE-266 - Incorrect Privilege Assignment

Assigner

VulDB

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

1 product

Vendor	Product	Version
HKUDS	nanobot	Affected: 0.2.0 Affected: 0.2.1 Unaffected: 0.3.0 cpe:2.3:a:nanobot:nanobot::::::::

Credits

Eric-c (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

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                "id": "CVE-2026-19244",
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                  },
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                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2026-08-07T20:49:44.451433Z",
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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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-QWP6-WXVX-2JC8

CVE-2026-19244 (GCVE-0-2026-19244)

Tags

Sightings

Nomenclature