Security Advisory
CVE-2026-32887
CVE vulnerability detail — eXtreme Datacenter Security Operations
Description
Effect is a TypeScript framework that consists of several packages that work together to help build TypeScript applications. Prior to version 3.20.0, when using `RpcServer.toWebHandler` (or `HttpApp.toWebHandlerRuntime`) inside a Next.js App Router route handler, any Node.js `AsyncLocalStorage`-dependent API called from within an Effect fiber can read another concurrent requests context — or no context at all. Under production traffic, `auth()` from `@clerk/nextjs/server` returns a different users session. Version 3.20.0 contains a fix for the issue.