# Deno v1.26.0 — Release & Upgrade Intelligence
- **Product:** Deno (https://deno.com)
- **Version:** v1.26.0
- **Released:** Sep 28, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/deno/updates/v1.26.0/

## Executive Summary (TL;DR)
Deno v1.26.0. Source highlight: feat: add --allow-sys permission flag (#16028)

## New Features
- feat: add --allow-sys permission flag (#16028)
- feat: add --no-npm flag to disable npm: imports (#15673)
- feat: Add requesting API name to permission prompt (#15936)
- feat: allow exiting on two consecutive ctrl+c presses (#15981)
- feat: download progress bar (#15814)
- feat: implement Web Cache API (#15829)

## Improvements
- perf: don't re-download package tarball to global cache if local node_modules
- perf: use fast ops for tty (#15976)
- perf(ext/console): break on iterableLimit & better sparse array handling
- perf(ext/fetch): use content-length in InnerBody.consume (#15925)

## Bug Fixes
- fix(cli/bench): strace numeric format (#16055)
- fix(cli/vendor): handle assert type json during vendoring (#16059)
- fix(ext/console): fix error when logging a proxied Date (#16018)
- fix(ext/fetch): blob url (#16057)
- fix(ext/flash): reregister socket on partial read on Windows (#16076)
- fix(fmt): keep type args in type queries and keep empty array expr element's