Vulnerability-Lookup

CVE-2026-19964 (GCVE-0-2026-19964)

Vulnerability from cvelistv5 – Published: 2026-08-16 23:45 – Updated: 2026-08-18 13:37

Title

Jij-Inc Jij-MCP-Server jm_check python_repr.py PythonREPL.run code injection

Summary

A vulnerability was found in Jij-Inc Jij-MCP-Server 0.1.0. This affects the function PythonREPL.run of the file jij_mcp/python_repr.py of the component jm_check. The manipulation of the argument code results in code injection. It is possible to launch the attack remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.

Severity

5.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

5.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

5.5 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-18 13:24 UTC

CWE

CWE-94 - Code Injection
CWE-74 - Injection

Assigner

VulDB mitre root

References

5 references

URL	Tags
https://vuldb.com/vuln/391141	vdb-entrytechnical-description
https://vuldb.com/vuln/391141/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-19964	third-party-advisory
https://vuldb.com/submit/872906	third-party-advisory
http://github.com/Jij-Inc/Jij-MCP-Server/issues/4	exploitissue-tracking

Impacted products

1 product

Vendor	Product	Version	CPE status
Jij-Inc	Jij-MCP-Server	Affected: 0.1.0 cpe:2.3:a:jij-inc:jij-mcp-server::::::::

Credits

TianyuLi (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-19964

Vulnerability from fkie_nvd - Published: 2026-08-17 00:16 - Updated: 2026-08-18 14:16

Severity

5.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	http://github.com/Jij-Inc/Jij-MCP-Server/issues/4
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-19964
	cna@vuldb.com	https://vuldb.com/submit/872906
	cna@vuldb.com	https://vuldb.com/vuln/391141
	cna@vuldb.com	https://vuldb.com/vuln/391141/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:jij-inc:jij-mcp-server:*:*:*:*:*:*:*:*"
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          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-19964",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-18T13:24:22.866700Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-17T00:16:27.290",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "http://github.com/Jij-Inc/Jij-MCP-Server/issues/4"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-19964"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/872906"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/391141"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/391141/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        },
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-G33M-CXJ9-5GVX

Vulnerability from github – Published: 2026-08-17 00:31 – Updated: 2026-08-17 00:31

Details

Severity

5.5 (Medium)


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

2.0 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-19964"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-74"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-17T00:16:27Z",
    "severity": "LOW"
  },
  "details": "A vulnerability was found in Jij-Inc Jij-MCP-Server 0.1.0. This affects the function PythonREPL.run of the file jij_mcp/python_repr.py of the component jm_check. The manipulation of the argument code results in code injection. It is possible to launch the attack remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "GHSA-g33m-cxj9-5gvx",
  "modified": "2026-08-17T00:31:30Z",
  "published": "2026-08-17T00:31:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19964"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-19964"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/872906"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/391141"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/391141/cti"
    },
    {
      "type": "WEB",
      "url": "http://github.com/Jij-Inc/Jij-MCP-Server/issues/4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/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"
    }
  ]
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-19964 (GCVE-0-2026-19964)

FKIE_CVE-2026-19964

GHSA-G33M-CXJ9-5GVX

Tags

Sightings

Nomenclature