# Astro astro@6.3.2 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@6.3.2
- **Released:** May 13, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-6.3.2/

## Executive Summary (TL;DR)
Astro astro@6.3.2. Source highlight: Fixes a regression where `Astro.cache` was `undefined` when `experimental.cache` was not configured.

## Bug Fixes
- Fixes a regression where `Astro.cache` was `undefined` when `experimental.cache` was not configured.
- Fixes `HTMLElement is not defined` error during HMR when using components with client-side scripts (e.g. Starlight `<Tabs>`) and the Cloudflare adapter
- Fixes non-prerendered routes failing when a dynamic prerendered route exists in the same project with `prerenderEnvironment: 'node'`
- Fixes a bug where the Astro compiler wasn't freed at the end of the build. After the fix, the memory used by the compiler is now correctly freed at the end of the build.
- Tightens `isRemotePath()` to reject control characters after a leading slash and fixes the dev image endpoint origin check
- Improve validation messages for `security.csp.directives` when `script-src` or `style-src` are incorrectly placed in the `directives` array.

## Upgrade Command
```bash
npm install --save-exact astro@6.3.2
```