CVE-2026-67531

FrontMCP is a TypeScript-first framework for the Model Context Protocol MCP. Prior to 1.5.7, the sandboxed codecall:execute tool exposes live host Zod schema instances to the script via getTool, and because Zod v4 defines zod as a non-configurable, non-writable own property, the ECMAScript Proxy...

CVE-2026-67531 FrontMCP: CodeCall sandbox escape -> host RCE via live Zod schema exposure by getTool

FrontMCP is a TypeScript-first framework for the Model Context Protocol MCP. Prior to 1.5.7, the sandboxed codecall:execute tool exposes live host Zod schema instances to the script via getTool, and because Zod v4 defines zod as a non-configurable, non-writable own property, the ECMAScript Proxy...

CVE-2026-67531

FrontMCP is a TypeScript-first framework for the Model Context Protocol MCP. Prior to 1.5.7, the sandboxed codecall:execute tool exposes live host Zod schema instances to the script via getTool, and because Zod v4 defines zod as a non-configurable, non-writable own property, the ECMAScript Proxy...

EUVD-2026-53684

FrontMCP is a TypeScript-first framework for the Model Context Protocol MCP. Prior to 1.5.7, the sandboxed codecall:execute tool exposes live host Zod schema instances to the script via getTool, and because Zod v4 defines zod as a non-configurable, non-writable own property, the ECMAScript Proxy...

CVE-2026-67531

CVE-2026-67531 affects FrontMCP before 1.5.7. The sandboxed codecall:execute tool could leak live host Zod schema instances to scripts via getTool, and due to Zod v4 _zod being non-configurable/non-writable, the ECMAScript Proxy invariant returned the raw host object. This allowed a script to rea...

CVE-2026-67531 FrontMCP: CodeCall sandbox escape -> host RCE via live Zod schema exposure by getTool

FrontMCP is a TypeScript-first framework for the Model Context Protocol MCP. Prior to 1.5.7, the sandboxed codecall:execute tool exposes live host Zod schema instances to the script via getTool, and because Zod v4 defines zod as a non-configurable, non-writable own property, the ECMAScript Proxy...

Server-side Request Forgery (SSRF)

Overview @frontmcp/sdk is a FrontMCP SDK Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the initialize process. An attacker can access internal network resources or sensitive local files by submitting a crafted OpenAPI specification containing malicious $r...

Server-side Request Forgery (SSRF)

Overview @frontmcp/adapters is an Adapters for the FrontMCP framework Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the initialize process. An attacker can access internal network resources or sensitive local files by submitting a crafted OpenAPI...

CVE-2026-39885

CVE-2026-39885 affects FrontMCP (prior to 2.3.0) via the mcp-from-openapi library, which dereferences $ref in OpenAPI specs without URL restrictions, enabling SSRF and local file reads when processing untrusted specs. Fixed in 2.3.0. CVSS v3.1 base score 7.5 (HIGH). Exploitation status not provid...

CVE-2026-39885 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 OpenA...

CVE-2026-39885 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 OpenA...

frontmcp 代码问题漏洞

FrontMCP is an open-source MCP server development framework based on TypeScript, created by AgentFront. Versions of FrontMCP prior to 2.3.0 had code-related vulnerabilities. These vulnerabilities stemmed from the lack of restrictions on URL reference resolution, which could lead to server-side...