--- title: "Cloudflare Miniflare v5 changes local development behavior and APIs: 2026-09-08 | Harbyn" description: "Cloudflare Miniflare v5 changes local development behavior and APIs, announced Sep 8, 2026." canonical: "https://harbyn.com/changes/cloudflare/2026-09-08-workers-miniflare-v5-prepares-local-development-for-the-cf-cli" last-updated: 2026-10-08 --- # Cloudflare Miniflare v5 changes local development behavior and APIs Markdown version of . Breaking change - Cloudflare. medium severity. In effect. Miniflare v5 adopts a configuration shape aligned with cloudflare.config.ts, removes deprecated and internal APIs such as legacy alpha D1 bindings and wrappedBindings, drops built-in module discovery, moves local-only /cdn-cgi routes under /cdn-cgi/local, and replaces per-resource persistence options with shared persistence roots. Projects that use Miniflare only through Wrangler or the Cloudflare Vite and Vitest plugins need no action. ## Facts | Fact | Value | | --- | --- | | Vendor | [Cloudflare](https://harbyn.com/vendors/cloudflare.md) | | Kind | Breaking change | | Severity | medium | | Status | In effect | | Announced | Sep 8, 2026 | | Added to Harbyn | Oct 8, 2026 | | Lead time | No dated deadline | | Symbols | `wrappedBindings` | | Vendor page | | | Review | Reviewed by a person, extracted by a model | ## Find it in your code ```sh npx harbyn scan ``` This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses Cloudflare, from its packages and API hosts. Nothing leaves your machine. ## Sources Where this event comes from: the page we read, when we read it, and the hash of that snapshot. - (changelog, fetched 2026-10-08 17:16 UTC, sha256 `973fb8762af99818dc6dbcdab6ede7e50c65150b9db76acf6eb3f0f95506d863`) ## Related changes ### More from Cloudflare - [Workers size limit is now 64 MiB uncompressed on all plans](https://harbyn.com/changes/cloudflare/2026-09-04-workers-deploy-larger-workers-up-to-64-mib-for-both-free-and-paid-plans.md) (Behavior change, announced Sep 4, 2026) - [Radar top browsers and NetFlows summary endpoints deprecated](https://harbyn.com/changes/cloudflare/2026-10-02-radar-top-browsers-and-netflows-summary-endpoints-deprecated.md) (Deprecation, effective Apr 2, 2027) - [Array form of createBatch() is deprecated](https://harbyn.com/changes/cloudflare/2026-10-08-workflows-workers-create-workflow-instance-batches-by-count-or-list-2.md) (Deprecation, announced Oct 8, 2026) - [Clef returns decisions up to 2x faster on Workers AI](https://harbyn.com/changes/cloudflare/2026-10-09-workers-ai-clef-omni-adds-audio-and-video-input-clef-flash-is-now-cheaper-an-2.md) (Behavior change, announced Oct 9, 2026) ### Changes at other vendors - [Amazon Selling Partner API: October listing attribute usage and enumeration value updates](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-2.md) (effective Oct 26, 2026) - [Supabase: four CBC-mode TLS 1.2 cipher suites will be removed from project HTTP APIs](https://harbyn.com/changes/supabase/2026-10-12-an-outdated-subset-of-tls-1-2-ciphers-will-be-disabled-on-project-http-apis.md) (effective Nov 10, 2026) - [Google Workspace APIs: OAuth clients must be marked as agentic to call Google Workspace MCP servers](https://harbyn.com/changes/google-workspace/2026-10-12-oauth-clients-must-be-marked-as-agentic-to-call-google-workspace-mcp-servers.md) (effective Nov 11, 2026) - [Bitbucket Cloud API: Git Credential Manager upgrade required for OAuth 2.0 Git authentication](https://harbyn.com/changes/bitbucket/2026-10-13-git-credential-manager-upgrade-required-for-oauth-2-0-git-authentication.md) (effective Nov 30, 2026) [All upcoming deadlines](https://harbyn.com/deadlines.md)