# Deno v2.8.1 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v2.8.1
- **Released:** May 27, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v2.8.1/

## Executive Summary (TL;DR)
Deno v2.8.1. Source highlight: Revert "fix(ext/node): polyfill module.enableCompileCache and companions"

## New Features
- feat(bundle): support `browser` field map in package.json (#34407)

## Improvements
- perf(ext/node): reuse keep-alive timer in node:http server (#34302)

## Bug Fixes
- Revert "fix(ext/node): polyfill module.enableCompileCache and companions"
- fix(bundle): read package.json sideEffects field (#34406)
- fix(cli): clearer error when importing .node addon via ESM (#34361)
- fix(config): don't panic when --config path can't be converted to URL (#34351)
- fix(core): allow host objects to round-trip through core.deserialize (#34380)
- fix(core): keep lazy_loaded_esm sources across concurrent loads (#34353)