Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| agentfront / frontmcp | affected < 1.0.4 |
| @frontmcp / adapters | affected < 1.0.4 |
| @frontmcp / sdk | affected < 1.0.4 |
| frontmcp / mcp-from-openapi | affected < 2.3.0 |
CWE
CWE-918
References
- https://github.com/agentfront/frontmcp/security/advisories/GHSA-v6ph-xcq9-qxxj
- https://github.com/agentfront/frontmcp/releases/tag/v1.0.4
ADP enrichment
No English description supplied.