cloudflare/workerd

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The JavaScript / Wasm runtime that powers Cloudflare Workers

Stars: 8.7k
Forks: 739
Open beginner issues: 0
Indexed issues: 464
Avg merge: 2d 20h
Merged PRs (30d): 174

Dominant language: C++
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 15, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: good first issue

Open All

464 open issues indexed

🐛 Bug Report — Websocket connections fail silently Open

cloudflare/workerd#2844 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
@cloudflare/workers-types overwrites DOM types from typescript and blows up typechecking Open

bug types

cloudflare/workerd#2874 · 0 comments · 2 reactions · 1 assignee · Indexed Sep 15, 2026
Feature request — Runtime APIs [URL.createObjectURL] Open

api feature request nodejs compat wpt-conformance

cloudflare/workerd#2969 · 2 comments · 5 reactions · 1 assignee · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs. reply method of the EmailMessage object does not exist Open

cloudflare/workerd#2992 · 2 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
🐛 Bug Report — Node errors doesn't have code property Open

cloudflare/workerd#2994 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — TypeError: memory limit has been exceeded with inline `data:` URL Open

cloudflare/workerd#2998 · 14 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Bug report — Rewriting a WebSocket response throws exception due to unsupported status code 101. Open

feature request

cloudflare/workerd#3047 · 17 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[D1] Raise SQLITE_LIMIT_SQL_LENGTH Open

cloudflare/workerd#3049 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"Type instantiation is excessively deep and possibly infinite", unidentified DO types, attempting to get a clean type from DO RPC Call Open

types

cloudflare/workerd#3063 · 5 comments · 1 reaction · 1 assignee · Indexed Sep 15, 2026
Challenges and Solutions for Using Types in Turborepo with Service Bindings Open

types

cloudflare/workerd#3113 · 11 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs - Workered internal error terminates websocket connections in wrangler/partykit server Open

cloudflare/workerd#3119 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs - WritableStream DefaultWriter await write() does not copy chunk buffer Open

api bug spec-compliance streams web platform

cloudflare/workerd#3137 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs - Durable Object Alarm Open

cloudflare/workerd#3138 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Question] gRPC/gRPC-web (+streaming) support for CloudFlare Workers Open

cloudflare/workerd#3150 · 0 comments · 8 reactions · 0 assignees · Indexed Sep 15, 2026
Add addTag(tag) and removeTag(tag) for websocket hibernation Open

cloudflare/workerd#3160 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Noisy logging on client resets to DiskDirectory services Open

cloudflare/workerd#3207 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Crash when trying to use connor4312/cockatiel Open

cloudflare/workerd#3226 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — failed: connect(): Cannot assign requested address; address = [::1]:44563 Open

cloudflare/workerd#3232 · 2 comments · 5 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — V8 fatal error when debugging Open

cloudflare/workerd#3248 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
🐛 BUG: reasoning about the TTFB outliers Open

bug

cloudflare/workerd#5967 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs: large wasm memory allocations bring a DurableObject into broken state Open

cloudflare/workerd#3264 · 15 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Runtime APIs: MessageChannel Open

feature request web platform

cloudflare/workerd#3273 · 10 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
🐛 BUG: pyodide needs updating to support `to_py` for JS -> python conversion Open

bug python

cloudflare/workerd#3322 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`performance.now()` time doesn't incement on locally running workerd instances Open

cloudflare/workerd#3288 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — `request.cf` empty on Windows Open

cloudflare/workerd#3310 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Feature Request: Warning when hitting the Cloudflare Platform Limits Open

feature request

cloudflare/workerd#3317 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
@cf/openai/whisper is missing on ai models list Open

types

cloudflare/workerd#3337 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Improving V8's error thrown when WebAssembly.instantiate(...) is used with a buffer Open

cloudflare/workerd#3345 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 BUG: Cannot deploy with amqplib lib Open

cloudflare/workerd#3352 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
AI types breaking change in `BaseAiSpeechRecognition` Open

types

cloudflare/workerd#3357 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Having issues setting up durable objects with nuxt 3 Open

cloudflare/workerd#3359 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🚀 Feature Request: support import with type syntax (standard now) Open

cloudflare/workerd#5265 · 14 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Failing Web Platform Tests: urlencoded-parser.any.js due to invalid HTTP method Open

wpt-conformance

cloudflare/workerd#3453 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
SubtleCryptoDeriveKeyAlgorithm has wrong field name for `public` Open

types

cloudflare/workerd#3466 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
🐛 Bug Report — SIGABORTs on macOS (JS heap OOM) Open

cloudflare/workerd#3473 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Response.redirect() doesn't throw error on too large header Open

cloudflare/workerd#3486 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support downloading from custom registry in postinstall script Open

cloudflare/workerd#3493 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Postgres + Workers production connection deadlock Open

cloudflare/workerd#3514 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Internal Errors of Type Invalid Arguments/Out of Bound Array Access Open

cloudflare/workerd#3532 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
instantiateStreaming Open

cloudflare/workerd#3583 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Preparing for `import defer` Open

spec-compliance

cloudflare/workerd#3584 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Supporting typescript erasable syntax Open

cloudflare/workerd#3587 · 0 comments · 9 reactions · 0 assignees · Indexed Sep 15, 2026
Preparing for Immutable / Limited ArrayBuffer Open

spec-compliance

cloudflare/workerd#3588 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
WebAssembly.compile(): Wasm code generation disallowed by embedder Open

cloudflare/workerd#3593 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 BUG: Python module cloudflare using workers ai fails with @cf/lykon/dreamshaper-8-lcm Open

bug

cloudflare/workerd#3681 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Tracking: Modern Algorithms in Web Crypto Spec Open

cloudflare/workerd#3642 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Extracting Ambient Module Types Open

types

cloudflare/workerd#3648 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 15, 2026
`AbortController` outside of request context Open

api feature request spec-compliance

cloudflare/workerd#3657 · 2 comments · 4 reactions · 1 assignee · Indexed Sep 15, 2026
Cancelled workflow jobs put CI in a limbo state Open

cloudflare/workerd#3660 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[proposal] allow workers to trigger pings on websockets Open

cloudflare/workerd#3664 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026

cloudflare/workerd

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