cloudflare/workers-sdk miniflare@4.20260114.0

on GitHub

Minor Changes

• #11883 4714ca1 Thanks @dario-piotrowicz! - Add MF-Original-Hostname header when using the upstream option

  When using the upstream option in Miniflare, the Host header is rewritten to match the upstream server, which means the original hostname is lost. This change adds a new MF-Original-Hostname header that preserves the original hostname from the incoming request.

  This allows Workers to access the original hostname when proxying requests through an upstream server:

  export default {
  	async fetch(request) {
  		const originalHostname = request.headers.get("MF-Original-Hostname");
  		// originalHostname contains the hostname before it was rewritten
  	},
  };

Patch Changes

• #11908 e78186d Thanks @dependabot! - chore: update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  workerd	1.20260111.0	1.20260114.0

• #11898 c17e971 Thanks @petebacondarwin! - Bundle more third-party dependencies to reduce supply chain risk

  Previously, several small utility packages were listed as runtime dependencies and
  installed separately. These are now bundled directly into the published packages,
  reducing the number of external dependencies users need to trust.

  Bundled dependencies:

  • miniflare: acorn, acorn-walk, exit-hook, glob-to-regexp, stoppable
  • kv-asset-handler: mime
  • vite-plugin-cloudflare: @remix-run/node-fetch-server, defu, get-port, picocolors, tinyglobby
  • vitest-pool-workers: birpc, devalue, get-port, semver