github - ghsa-7f8r-222p-6f5g

ghsa-7f8r-222p-6f5g

Vulnerability from github

Published

2025-06-13 22:15

Modified

2025-07-09 20:18

Severity ?

9.4 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Summary

MCP Inspector proxy server lacks authentication between the Inspector client and proxy

Details

Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.

Credit: Rémy Marot bughunters@tenable.com

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@modelcontextprotocol/inspector"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.14.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-49596"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-13T22:15:26Z",
    "nvd_published_at": "2025-06-13T20:15:23Z",
    "severity": "CRITICAL"
  },
  "details": "Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.\n\nCredit: R\u00e9my Marot \u003cbughunters@tenable.com\u003e",
  "id": "GHSA-7f8r-222p-6f5g",
  "modified": "2025-07-09T20:18:37Z",
  "published": "2025-06-13T22:15:26Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-49596"
    },
    {
      "type": "WEB",
      "url": "https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/modelcontextprotocol/inspector"
    },
    {
      "type": "WEB",
      "url": "https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis"
    },
    {
      "type": "WEB",
      "url": "https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "MCP Inspector proxy server lacks authentication between the Inspector client and proxy"
}

CVE-2025-49596 (GCVE-0-2025-49596)

Vulnerability from cvelistv5

Published

2025-06-13 20:11

Modified

2025-07-09 20:19

Severity ?

9.4 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CWE

CWE-306 - Missing Authentication for Critical Function

Summary

The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.

References

▼	URL	Tags
	https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g	x_refsource_CONFIRM
	https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979	x_refsource_MISC
	https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis	x_refsource_MISC
	https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	modelcontextprotocol	inspector	Version: < 0.14.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-49596",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-13T20:32:46.383577Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-06-23T16:07:46.575Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "inspector",
          "vendor": "modelcontextprotocol",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.14.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.4,
            "baseSeverity": "CRITICAL",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-306",
              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-09T20:19:02.667Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g"
        },
        {
          "name": "https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979"
        },
        {
          "name": "https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis"
        },
        {
          "name": "https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596"
        }
      ],
      "source": {
        "advisory": "GHSA-7f8r-222p-6f5g",
        "discovery": "UNKNOWN"
      },
      "title": "MCP Inspector proxy server lacks authentication between the Inspector client and proxy"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-49596",
    "datePublished": "2025-06-13T20:11:40.453Z",
    "dateReserved": "2025-06-06T15:44:21.557Z",
    "dateUpdated": "2025-07-09T20:19:02.667Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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