GHSA-x8rx-789c-2pxq RedwoodSDK has a CSRF vulnerability in server function dispatch via GET requests

• npm rwsdk: >= 1.0.0-beta.50, < 1.0.6 → fixed in 1.0.6

Summary Server functions exported from `"use server"` files could be invoked via GET requests, bypassing their intended HTTP method. In cookie-authenticated applications, this allowed cross-site GET navigations to trigger state-changing functions, because browsers send `SameSite=Lax` cookies on top-level GET requests. This affected all server functions -- both `serverAction()` handlers and bare exported functions in `"use server"` files. Impact An attacker could construct a URL containing a known action ID and JSON-encoded arguments. When a victim with an active session visited or was redirected to this URL, the function executed with the victim's credentials. This affected any server function that performs state-changing operations (writes, deletes, mutations) in applications using cookie-based authentication. Remediation Update to rwsdk `1.0.6`. No application code changes are required. The fix enforces the declared HTTP method at dispatch time. GET requests to server functions that require POST now return `405 Method Not Allowed`.