cloudflare/workers-sdk miniflare@4.20260617.0

on GitHub

Patch Changes

• #14347 673b09e Thanks @jamesopstad! - Update undici from 7.24.8 to 7.28.0

• #14346 e930bd4 Thanks @haidargit! - Bump ws from 8.20.1 to 8.21.0 to address GHSA-96hv-2xvq-fx4p

  GHSA-96hv-2xvq-fx4p / CVE-2026-48779 (high severity) reports a remote memory-exhaustion DoS in ws@<8.21.0: a peer sending a high volume of tiny fragments and data chunks over modest network traffic can crash a ws server or client via OOM. The fix shipped in ws@8.21.0 (commit 2b2abd45, released 2026-05-22), which also introduces the maxBufferedChunks and maxFragments options. This change bumps the workspace catalog entry so that miniflare, wrangler, and @cloudflare/vite-plugin all pick up the patched release.

• #14314 5c3bb11 Thanks @harryzcy! - Bump esbuild to 0.28.1

  This update includes several bug fixes from esbuild versions 0.27.3 through 0.28.1. See the esbuild changelog for details.

• #14331 296ad65 Thanks @dependabot! - Update dependencies of "miniflare", "wrangler"

  The following dependency versions have been updated:

  Dependency	From	To
  workerd	1.20260616.1	1.20260617.1