{"api_version":"1","generated_at":"2026-04-09T01:39:47+00:00","cve":"CVE-2026-39885","urls":{"html":"https://cve.report/CVE-2026-39885","api":"https://cve.report/api/cve/CVE-2026-39885.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-39885","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-39885"},"summary":{"title":"FrontMCP Affected by SSRF via $ref Dereferencing in Untrusted OpenAPI Specifications","description":"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. 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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.","Type":"Description","Title":"FrontMCP Affected by SSRF via $ref Dereferencing in Untrusted Op"}]}}}