{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:agentfront:\\@frontmcp\\/adapters:*:*:*:*:*:node.js:*:*",
              "cpe:2.3:a:agentfront:\\@frontmcp\\/sdk:*:*:*:*:*:node.js:*:*",
              "cpe:2.3:a:agentfront:frontmcp:*:*:*:*:*:node.js:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.0.4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "c13e7651968d08223bcf996d4d39f84fe2040c4c"
            }
          ],
          "repo": "https://github.com/agentfront/frontmcp",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-v6ph-xcq9-qxxj"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39885.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "2.3.0"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "FrontMCP is a TypeScript-first framework for the Model Context Protocol (MCP). Prior to 2.3.0, the mcp-from-openapi library uses @apidevtools/json-schema-ref-parser to dereference $ref pointers in OpenAPI specifications without configuring any URL restrictions or custom resolvers. A malicious OpenAPI specification containing $ref values pointing to internal network addresses, cloud metadata endpoints, or local files will cause the library to fetch those resources during the initialize() call. This enables Server-Side Request Forgery (SSRF) and local file read attacks when processing untrusted OpenAPI specifications. This vulnerability is fixed in 2.3.0.",
  "id": "CVE-2026-39885",
  "modified": "2026-07-08T05:39:07.469164544Z",
  "published": "2026-04-08T20:34:20.538Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/agentfront/frontmcp/releases/tag/v1.0.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39885.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxj"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39885"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "FrontMCP Affected by SSRF via $ref Dereferencing in Untrusted OpenAPI Specifications"
}