Langflow has Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers

Summary Langflow's project-scoped MCP transport authenticates the caller for the projectid in the connection URL, but the subsequent resources/read operation does not authorize the resource URI being requested. An authenticated user can connect to their own project-scoped MCP endpoint and supply ...

GHSA-4HMC-CFM3-W43C Langflow has Authenticated Cross-Project File Disclosure via Unscoped MCP Resource Handlers

Summary Langflow's project-scoped MCP transport authenticates the caller for the projectid in the connection URL, but the subsequent resources/read operation does not authorize the resource URI being requested. An authenticated user can connect to their own project-scoped MCP endpoint and supply ...