GHSA-7F8R-222P-6F5G

Vulnerability from github – Published: 2025-06-13 22:15 – Updated: 2025-07-09 20:18
VLAI?
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

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
Show details on source website
To clipboard 

{
  "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"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.