# Astro astro@6.4.6 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@6.4.6
- **Released:** Jun 10, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-6.4.6/

## Executive Summary (TL;DR)
Astro astro@6.4.6. Source highlight: Fixes an issue where renaming an image file while the dev server is running triggers a build error. Now Astro correctly hot-reloads the image without crashing.

## Bug Fixes
- Fixes an issue where renaming an image file while the dev server is running triggers a build error. Now Astro correctly hot-reloads the image without crashing.
- Hardens `addAttribute` to drop attribute names containing characters that are invalid per the HTML spec (`"`, `'`, `>`, `/`, `=`, whitespace)
- Validates the request origin against `allowedDomains` before fetching prerendered error pages. When `allowedDomains` is configured and the Host header matches, the original origin is used. Otherwise, the fetch falls back to `localhost`.

## Upgrade Command
```bash
npm install --save-exact astro@6.4.6
```