CVE-2026-56301 is a medium severity vulnerability in Nuxt's development server on Linux when running with Node.js 20 or higher outside containerized environments. The internal vite-node IPC server binds to an abstract-namespace Unix socket without permission restrictions, allowing any local user who can read /proc/net/unix to connect. This enables unauthorized local users to read sensitive files from the developer's environment via SSR plugin requests. The issue affects only development mode (nuxt dev) on shared multi-tenant Linux hosts and not production builds or containerized environments. The vulnerability is fixed in Nuxt versions 4.4.7 and 3.21.7 by switching to a filesystem socket with restricted permissions.