cloudflare/workerd

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

`tools\cross\wpt_logs.py` loading whole xml file Open

cloudflare/workerd#6333 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Implement the Console.CreateTask API Open

cloudflare/workerd#6408 · 0 comments · 3 reactions · 0 assignees · Indexed Sep 15, 2026
Support for android arm64 version Open

cloudflare/workerd#6434 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Please add a non-standard `crypto.KeyedDigestStream` (or future-standard `crypto.subtle.sign` iterator input) for computing streaming HMACs Open

cloudflare/workerd#6435 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Response.clone() + HTMLRewriter.transform() deadlocks when clone is read first Open

cloudflare/workerd#6436 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
socket.closed() throws with an undefined rejection reason Open

cloudflare/workerd#6439 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
WorkerEntrypoint RPC crashes (wallTime=0) when worker co-exports a DurableObject class Open

cloudflare/workerd#6453 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support HTTP/2 bidirectional streaming (gRPC) in Workers/Durable Objects Open

cloudflare/workerd#6455 · 12 comments · 7 reactions · 0 assignees · Indexed Sep 15, 2026
`socket.closed` rejects with `undefined` when `socket.close()` is called after remote FIN Open

cloudflare/workerd#6479 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`console.createTask` support Open

cloudflare/workerd#6488 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
ElasticSearch Support in Cloudflare Workers Open

cloudflare/workerd#6527 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Windows: --nowindows_enable_symlinks workaround for TypeScript builds causes test targets to fail to build Open

cloudflare/workerd#6510 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Feature Request: Support for Maximal Marginal Relevance (MMR) in Vectorize Open

cloudflare/workerd#6543 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
wrangler check startup does not consistently include entire startup time, leading to incorrect profiles and timing information Open

cloudflare/workerd#6544 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Missing types for undefined jurisdiction Open

types

cloudflare/workerd#6551 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Durable Object ordering is not preserved when mixing RPC and fetch calls on the same stub Open

cloudflare/workerd#6561 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Missing type for Durable Object errors Open

Durable Objects types

cloudflare/workerd#6577 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Bug Report - Segmentation fault on MacOS with workerd and wrangler and vitest Open

cloudflare/workerd#6583 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Feature Request: Allow arbitrary unauthorized self-signed certificates Open

cloudflare/workerd#6586 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Python Workers: NoGilError race condition during concurrent request initialization (preparePython) Open

cloudflare/workerd#6624 · 23 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Cloudflare Workers node:crypto scrypt: Missing Error Codes and maxmem=0 Mismatch Open

nodejs compat

cloudflare/workerd#6639 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Explicit regional placement disables WebSocket permessage-deflate while Smart Placement works Open

cloudflare/workerd#6671 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`assignSocket` method is not implemented Open

cloudflare/workerd#6673 · 2 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — `new Request(Proxy(request))` fails Open

cloudflare/workerd#6700 · 7 comments · 0 reactions · 1 assignee · Indexed Sep 15, 2026
Durable Object facets can hit parent WebSocket Native handles in production but not local dev Open

cloudflare/workerd#6702 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Email Routing → Worker delivery: Authentication-Results header missing, ARC- Authentication-Results contains no SPF/DKIM/DMARC verdicts Open

cloudflare/workerd#6740 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
fetch() to public ArcGIS / IIS server fails with opaque `internal error; reference = …` in local dev Open

cloudflare/workerd#6746 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 `crypto.randomBytes` errors for values above 65536 Open

cloudflare/workerd#6749 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Bug: workerd segfaults intermittently on shutdown under vitest-pool-workers (linux-x64 and macOS-arm64) Open

cloudflare/workerd#6763 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs: node:zlib zstdCompressSync fails with Unexpected end of file on valid input Open

cloudflare/workerd#6769 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Outbound WebSocket in Durable Object closed (code 1005) after streaming subrequest body completes Open

cloudflare/workerd#6774 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs: service-binding RPC dispatch hangs on second back-to-back call to WorkerEntrypoint Open

cloudflare/workerd#6782 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Local Container readiness times out before app container starts when using Sandbox terminal Open

cloudflare/workerd#6790 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Containers local dev sidecar TPROXY rules intercept Docker bridge traffic Open

cloudflare/workerd#6793 · 1 comment · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Durable Object facets with SQLite prevent parent DO from hibernating — causing unexpected duration billing Open

cloudflare/workerd#6800 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Bug: Possible data race on InspectorService::isolates (main thread vs. inspector thread) Open

cloudflare/workerd#6803 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
content-length header dropped on HTTP/3 requests Open

cloudflare/workerd#6830 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
`JsRpcStub` destructor crashes workerd via `CaptureDetailedStackTrace` during V8 GC epilogue (SIGTRAP) Open

cloudflare/workerd#6842 · 2 comments · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Devcontainer fails to build on Apple Silicon (arm64) due to trixie base image Open

cloudflare/workerd#6808 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs: Facet `ctx.storage.setAlarm()` silently breaks SQLite-backed DO actor in local dev Open

cloudflare/workerd#6810 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 15, 2026
Date.now() and process.hrtime() return wall clock at top-level (global scope) in wrangler dev / Miniflare, but 0 in deployed workerd Open

cloudflare/workerd#6839 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Garbled Unicode when logging Error.message with non-ASCII characters (e.g. Chinese UTF-8) Open

cloudflare/workerd#6817 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Errored response-body streams terminate cleanly instead of aborting, silently truncating the response Open

cloudflare/workerd#6818 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Long-running worker OOMs in a memory-limited container: major/unified GC never triggers under sustained load (no cgroup-aware heap limit) Open

cloudflare/workerd#6824 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
🐛 Bug Report — Runtime APIs: client disconnect no longer cancels async ReadableStream response body (regressed in 1.20260619.1, persists in 1.20260717.1) Open

cloudflare/workerd#6832 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Queues: producer-side limit failures throw untyped Error with no code — add typed errors + a size helper Open

cloudflare/workerd#6834 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Testing issues Open

cloudflare/workerd#6843 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Outbound fetch stalls ~30s on requests with Expect: 100-continue instead of sending the body (breaks AWS SDK S3 PutObject under nodejs_compat) Open

cloudflare/workerd#6845 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Surface the embedded V8 version Open

cloudflare/workerd#6848 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support caching HTTP QUERY (RFC 10008) responses, keyed on the request body Open

cloudflare/workerd#6849 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

A short digest of beginner-friendly GitHub issues.