CVE-2026-39885— frontmcp 代码问题漏洞

FrontMCP Affected by SSRF via $ref Dereferencing in Untrusted OpenAPI Specifications

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.

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

服务端请求伪造(SSRF)

frontmcp 代码问题漏洞

frontmcp是AgentFront开源的一个基于TypeScript的MCP服务器开发框架。 FrontMCP 2.3.0之前版本存在代码问题漏洞，该漏洞源于未限制URL引用解析，可能导致服务端请求伪造和本地文件读取。

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