fix(deps): update dependency astro to v7 [security] by renovate[bot] · Pull Request #545 · MultiTheFranky/portfolio

renovate · 2026-07-21T07:50:09Z

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package	Change	Age	Confidence
astro (source)	`^6.3.1` → `^7.0.0`

Astro: Reflected XSS via unescaped View Transition animation properties

GHSA-4g3v-8h47-v7g6

More information

Details

Summary

Astro's server-side View Transition CSS generator interpolates animation properties into an inline <style> element without escaping them for the CSS and HTML contexts.

An attacker-controlled value passed to an animation property such as duration can contain a </style> sequence, terminate the generated style element, and inject arbitrary HTML or JavaScript.

This is similar to GHSA-8hv8-536x-4wqp, but exploits a different injection point: unescaped View Transition animation values in a server-generated <style> element rather than an unescaped slot name in a hydration template.

Like GHSA-8hv8-536x-4wqp, exploitation requires an application to pass attacker-controlled data to an Astro API. However, the value is subsequently inserted into the HTML response without context-appropriate escaping by Astro.

Details

packages/astro/src/runtime/server/transition.ts

The generated stylesheet is wrapped in a <style> element and marked as HTML-safe:

const css = sheet.toString();
result._metadata.extraHead.push(markHTMLString(`<style>${css}</style>`));

Animation properties are added to the stylesheet without escaping:

if (anim.duration) {
  addAnimationProperty(builder, 'animation-duration', toTimeValue(anim.duration));
}

For string values, toTimeValue() returns the input unchanged:

export function toTimeValue(num: number | string) {
  return typeof num === 'number' ? num + 'ms' : num;
}

As a result, a duration value containing </style> can escape from the generated style element.

Other TransitionAnimation properties, including easing, direction, delay, fillMode, and name, are serialized by the same animation builder. The following PoC only relies on the official fade() helper and its duration option.

PoC

Using:

astro@7.0.9
@astrojs/node@11.0.2

`astro.config.mjs`

import node from '@&#8203;astrojs/node';
import { defineConfig } from 'astro/config';

export default defineConfig({
  output: 'server',
  adapter: node({ mode: 'standalone' }),
});

`src/pages/index.astro`

---
import { fade } from 'astro:transitions';

const duration = Astro.url.searchParams.get('duration') ?? '300ms';
---

<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>PoC</title>
  </head>
  <body>
    <div transition:animate={fade({ duration })}>
      Animated content
    </div>
  </body>
</html>

Payload:

open:

http://localhost:4321/?duration=%3C%2Fstyle%3E%3Cscript%3Ealert(1)%3C%2Fscript%3E%3C!--

The browser interprets </style> as the end of the generated style element and executes the injected script. An alert dialog is displayed when the page is opened.

Impact

An attacker who can control a View Transition animation value can execute arbitrary JavaScript in the origin of the affected Astro application.

The query-based reflected XSS scenario affects on-demand/server-rendered routes, such as:

projects configured with output: "server";
pages using export const prerender = false;
other server-side data flows that pass attacker-controlled values into a View Transition animation definition.

Successful exploitation may allow access to sensitive page data and authenticated actions available to the victim.

Suggested Fix

Animation values should be serialized using context-appropriate CSS escaping or validation before being added to the generated stylesheet.

Additionally, content inserted into a raw <style> element must not be able to contain an HTML end-tag sequence such as </style>. The final generated CSS should be made safe for the HTML raw-text context before it is passed to markHTMLString().

Severity

CVSS Score: 5.3 / 10 (Medium)
Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Astro: Cross-site scripting via unescaped transition:* directive values on hydrated islands

CVE-2026-59727 / GHSA-7pw4-f3q4-r2p2

More information

Details

Summary

When a transition:persist, transition:scope, or transition:persist-props directive is applied to a client-hydrated (client:*) component, Astro copied the directive value onto the rendered <astro-island> element without HTML-escaping it. If a developer reflects attacker-controlled input into one of these directives, an attacker can break out of the attribute and inject arbitrary HTML/JavaScript into the server-rendered output, resulting in reflected cross-site scripting (XSS).

Severity

Although a generic reflected XSS scores in the Medium range, exploitation here requires the application developer to have written a non-idiomatic pattern — passing untrusted, request-derived input directly into a transition directive. Astro applications that do not route untrusted input into these directives are unaffected. This mitigating precondition places the real-world severity at Low.

Details

In generateHydrateScript() (packages/astro/src/runtime/server/hydration.ts), every island property is HTML-escaped before serialization — the attrs, props, and opts assignments all pass through escapeHTML(). The transition directives, however, were copied verbatim:

transitionDirectivesToCopyOnIsland.forEach((name) => {
  if (typeof props[name] !== 'undefined') {
    island.props[name] = props[name]; // not escaped
  }
});

The <astro-island> element is serialized via renderElement('astro-island', island, false) with shouldEscape=false, and toAttributeString() returns the value unchanged in that mode. As a result there is no downstream re-escaping, and the raw directive value reaches the HTML response. This is the same output sink previously addressed for slot names in GHSA-8hv8-536x-4wqp.

The affected directives are:

data-astro-transition-scope (transition:scope)
data-astro-transition-persist (transition:persist)
data-astro-transition-persist-props (transition:persist-props)

Note that transition:persist is typed boolean | string, so passing a string value is a supported use of the API.

Proof of Concept

A component that reflects a query parameter into a transition directive:

---
const persist = Astro.url.searchParams.get('persist') ?? 'default';
---
<Island client:load transition:persist={persist} />

Request:

https://example.com/?persist="><img src=x onerror=alert(document.domain)>

Rendered output (before the fix):

<astro-island … data-astro-transition-persist=""><img src=x onerror=alert(document.domain)>></astro-island>

The " closes the attribute and the injected <img onerror=…> executes in the victim's browser.

Impact

Reflected XSS. An attacker who can induce a victim to visit a crafted URL can execute arbitrary script in the victim's session on the origin, subject to the requirement that the target application reflects untrusted input into one of the affected transition directives.

Affected Versions

astro >= 3.10.0, < 7.0.4 (introduced in 3.10.0, PR #7861).

Patched Versions

astro >= 7.0.4. Fixed in PR #17212 by HTML-escaping transition directive values before they are rendered onto the island element.

Workarounds

Do not pass untrusted or request-derived input into transition:persist, transition:scope, or transition:persist-props. If such input is required, HTML-escape or strictly validate it before passing it to the directive. Upgrading to astro@7.0.4 or later removes the need for manual mitigation.

Credits

Reported by @jlgore.

Severity

CVSS Score: 2.1 / 10 (Low)
Vector String: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Astro: XSS via unescaped spread attribute names in renderHTMLElement (incomplete fix for CVE-2026-54298)

CVE-2026-59729 / GHSA-f48w-9m4c-m7f5

More information

Details

Summary

The fix for CVE-2026-54298 (GHSA-jrpj-wcv7-9fh9) added an INVALID_ATTR_NAME_CHAR guard to addAttribute() so that spread-prop attribute names containing "' >/= or whitespace are dropped. A second attribute-rendering path, renderHTMLElement() in packages/astro/src/runtime/server/render/dom.ts, has its own inline attribute loop that does not go through addAttribute() and was not updated. It interpolates the attribute name unescaped and only escapes the value, so untrusted prop keys spread onto a native-HTMLElement-subclass component can still break out of the attribute context, resulting in XSS.

Details

renderHTMLElement builds attributes directly:

for (const attr in props) {
  attrHTML += ` ${attr}="${toAttributeString(await props[attr])}"`;
}

The attribute name (attr) is interpolated raw; only the value is escaped via toAttributeString. By contrast, the hardened addAttribute in util.ts rejects invalid names:

if (INVALID_ATTR_NAME_CHAR.test(key)) { return ''; } // /[\s"'>/=]/

renderHTMLElement is reached from component.ts when the component is a native HTMLElement subclass:

if (!renderer && typeof HTMLElement === 'function' && componentIsHTMLElement(Component)) {
  const output = await renderHTMLElement(result, Component, _props, slots);
}

where _props carries spread props verbatim.

Reachability

The branch only runs when typeof HTMLElement === 'function' at SSR time. In default Node SSR HTMLElement is undefined, so the branch is dead. It becomes reachable when the SSR runtime exposes a global HTMLElement (Deno, Bun with a DOM shim, or jsdom/happy-dom in Node) and a class extending HTMLElement is used directly as an Astro component that receives untrusted-keyed spread props.

Proof of Concept

Given malicious spread props:

const maliciousProps = {
  'onmouseover=alert(document.domain) x': 'y',
  'x><script>alert(1)</script>': 'z',
};

addAttribute (post-fix) → <my-el></my-el> (key stripped — safe)
renderHTMLElement → <my-el onmouseover=alert(document.domain) x="y" x><script>alert(1)</script>="z"></my-el> (handler + <script> injected — XSS)

Equivalent Astro template, served by an SSR runtime that defines a global HTMLElement:

---
import MyElement from '../MyElement.js'; // class MyElement extends HTMLElement {}
const userInput = Astro.url.searchParams;  // untrusted keys
---
<MyElement {...Object.fromEntries(userInput)} />

Impact

Cross-site scripting (CWE-79) via attribute-name breakout — the same vulnerability class as CVE-2026-54298, in a code path its fix did not cover. An attacker who controls the keys of an object spread onto a native-HTMLElement-subclass component can inject arbitrary event-handler attributes or sibling elements (including <script>) into the SSR output. Reachability is constrained by the runtime and component preconditions described above.

Severity

CVSS Score: 5.1 / 10 (Medium)
Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

References

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

Release Notes

withastro/astro (astro)

`v7.1.0`

Compare Source

Minor Changes

#17302 5f4dc03 Thanks @astrobot-houston! - Adds a new deferRender option to the glob() content loader

When set to true, renderable entries (such as Markdown) are not rendered during content sync. Instead, rendering is deferred until the entry is actually rendered in a page, using the same on-demand path that .mdx files already use.

This reduces memory usage during astro build for large collections whose rendered output is much larger than the source — for example, Markdown that uses heavy rehype plugins like rehype-katex. Such builds could previously run out of memory while storing the eagerly-rendered HTML for every entry.
```
// src/content.config.ts
import { defineCollection } from 'astro:content';
import { glob } from 'astro/loaders';

const docs = defineCollection({
  loader: glob({ pattern: '**/*.md', base: 'src/content/docs', deferRender: true }),
});
```
By default deferRender is false, preserving the existing behavior of rendering entries eagerly during sync so their rendered HTML can be cached across builds.
#17296 30698a2 Thanks @ematipico! - Adds a new experimental collectionStorage option for controlling how the content layer persists its data store

By default, Astro serializes the entire content layer data store to a single file (.astro/data-store.json). For very large content collections, this file can grow large enough to hit platform file-size limits.

Set experimental.collectionStorage: 'chunked' to instead split the data store across many smaller, content-addressed files inside a .astro/data-store/ directory, described by a manifest:
```
// astro.config.mjs
import { defineConfig } from 'astro/config';

export default defineConfig({
  experimental: {
    collectionStorage: 'chunked',
  },
});
```
Because each part file is named by a hash of its contents, unchanged parts keep the same name across builds and are not rewritten, and identical parts are deduplicated. The default value is 'single-file', which preserves the current behavior.
#17214 44c4989 Thanks @ematipico! - Adds support for the more specific CSP directives script-src-elem, script-src-attr, style-src-elem, and style-src-attr through a new kind option.

Previously, CSP was only scoped to generic script-src/style-src directives. Now each source or hash can be scoped to a narrower directive — for example, to allow inline style attributes (such as those from define:vars or Shiki) without loosening the policy for your <style> and <link> elements.

Scoping sources and hashes in your config

Each entry in resources and hashes can be an object with a kind property. Depending on whether you use scriptDirective or styleDirective, "element" targets script-src-elem or style-src-elem, "attribute" targets script-src-attr or style-src-attr, and "default" (the same as a bare string or hash) targets script-src or style-src.

// astro.config.mjs
import { defineConfig } from 'astro/config';

export default defineConfig({
  security: {
    csp: {
      scriptDirective: {
        resources: [{ resource: 'https://cdn.example.com', kind: 'element' }],
      },
      styleDirective: {
        resources: [{ resource: "'unsafe-inline'", kind: 'attribute' }],
      },
    },
  },
});

Scoping at runtime

The same kind option is available on the runtime CSP API, where the existing methods now also accept an object:

ctx.csp.insertScriptResource({ resource: 'https://cdn.example.com', kind: 'element' });
ctx.csp.insertStyleResource({ resource: "'unsafe-inline'", kind: 'attribute' });

#17258 84814d4 Thanks @astrobot-houston! - Adds a new format() option to the paginate utility. The format() option is a function that accepts the current URL of the page, and returns a new URL.

For example, when your host only supports URLs using the .html extension, you can use format() to add it to the generated URLs:

---
export async function getStaticPaths({ paginate }) {
  // Load your data with fetch(), getCollection(), etc.
  const response = await fetch(`https://pokeapi.co/api/v2/pokemon?limit=150`);
  const result = await response.json();
  const allPokemon = result.results;

  // Return a paginated collection of paths for all items
  return paginate(allPokemon, {
    pageSize: 10,
    format: (url) => `${url}.html`,
  });
}

const { page } = Astro.props;
---

#17331 7db6420 Thanks @matthewp! - Adds a --ignore-lock flag to astro dev for starting a dev server without checking or writing the lock file, so it can run alongside an already-running dev server for the same project.

The new instance is not tracked by astro dev stop, astro dev status, or astro dev logs. --ignore-lock cannot be combined with --background (or an auto-detected AI agent environment, which runs dev servers in the background automatically) or --force, since those rely on the lock file.
```
astro dev --ignore-lock
```
#17389 16de021 Thanks @florian-lefebvre! - Allows passing URL entrypoints when configuring the logger

Matching other APIs like session drivers or font providers, the logger entrypoint can now be a URL:
```
import { defineConfig } from 'astro/config';

export default defineConfig({
  logger: {
    entrypoint: new URL('./logger.js', import.meta.url),
  },
});
```

Patch Changes

#17332 4407483 Thanks @astrobot-houston! - Fixes the JSON logger crashing with process is not defined in non-Node runtimes like Cloudflare's workerd. The JSON logger now uses console.log/console.error instead of process.stdout/process.stderr, matching the pattern already used by the console logger.
#17391 186a1e7 Thanks @florian-lefebvre! - Fixes a case where an integration could not update the logger with updateConfig()
#17394 d9f99e1 Thanks @matthewp! - Fixes element-specific CSP directives to preserve the existing behavior of configured script and style resources
#17374 b2d1b3e Thanks @astrobot-houston! - Fixes dev server returning 404 for ?url imported assets when accessed via browser navigation
#17390 ed71eaf Thanks @florian-lefebvre! - Removes an unused and undocumented generic from the AstroLoggerDestination type
#17393 092da56 Thanks @matthewp! - Hardens generated transition styles, development metadata, and server island URLs when embedding dynamic values

`v7.0.9`

Compare Source

Patch Changes

#17286 a249317 Thanks @astrobot-houston! - Fixes the first browser visit after astro dev starts triggering an immediate full page reload
#17369 a94d4a5 Thanks @adamchal! - Fixes an issue where a client island could permanently fail to hydrate if the first attempt to load its component failed. Islands now reliably recover from transient import failures, which previously did not work for React components during astro dev.

`v7.0.8`

Compare Source

Patch Changes

#17363 3f4efc5 Thanks @astrobot-houston! - Fixes astro preview --open not opening a browser when using an adapter with a custom preview entrypoint, such as @astrojs/cloudflare
#17313 e2e319d Thanks @ronits2407! - Exposes the AstroRuntimeLogger interface to allow users to properly type the logger functions at runtime.
#17328 025cc74 Thanks @matthewp! - Fixes astro dev --force not replacing an already-running dev server
#17353 2bba277 Thanks @ematipico! - Updates the Astro compiler to the latest version, which fixes many regressions. Refer to the changelog for more details.
#17344 79a41e0 Thanks @adamchal! - Improves rendering performance for pages with many component instances, such as repeated MDX <Content /> components.
Updated dependencies [64b0d66]:
- @astrojs/markdown-satteri@0.3.4

`v7.0.7`

Compare Source

Patch Changes

#17318 23a4120 Thanks @astrobot-houston! - Fixes CSS module scoped-name hash mismatch in astro dev when using vite.css.transformer: 'lightningcss' with content collections. Previously, a component importing a CSS module and rendered via content collection render() would get different class name hashes in the element and the injected <style> tag, causing styles not to apply.
#17323 4298883 Thanks @ematipico! - Fixes a dev server memory leak which caused Node.js to emit warnings in the console.
#17323 4298883 Thanks @ematipico! - Fixes a dev server crash when a .html or /index.html suffixed request (such as those netlify dev probes as pretty-URL fallbacks) matched a dynamic endpoint route, causing a TypeError: Missing parameter error
#17325 cebc404 Thanks @astrobot-houston! - Fixes a bug where CSS @import rules could end up mid-stylesheet after inline CSS chunks were merged during build, causing browsers to silently ignore them
#17323 4298883 Thanks @ematipico! - Fixes a build regression that could leave unresolved preload markers in inlined scripts with external dynamic imports
Updated dependencies [4298883, 4298883]:
- @astrojs/telemetry@3.3.3

`v7.0.6`

Compare Source

Patch Changes

#17261 79aa99c Thanks @astrobot-houston! - Fixes a false deprecation warning for markdown.gfm and markdown.smartypants when using the Container API
#17247 f94280d Thanks @chatman-media! - Fixes route generation throwing "Missing parameter" (or silently dropping the segment) when a dynamic param's value is 0. The generator used truthy checks instead of checking for undefined, so paginate(posts, { params: { categoryId: 0 } }) would crash even though 0 is a perfectly valid param value.
#17278 6f11739 Thanks @astrobot-houston! - Fixes missing CSS for virtual style modules (e.g., responsive image layout styles) in dev mode when JavaScript is disabled
#17250 0b30b35 Thanks @matthewp! - Fixes the security.checkOrigin check so it is applied consistently to Astro Actions and on-demand endpoints, regardless of how the request pipeline is composed. Previously, the origin check could be skipped in the composable astro/hono pipeline depending on the order of the middleware() primitive (or when it was omitted).
#17274 8c3579b Thanks @astrobot-houston! - Fixes missing render() type overload for live collection entries. Previously, calling render() on a LiveDataEntry produced a TypeScript error when using only live.config.ts without a content.config.ts.
#17257 4208297 Thanks @astrobot-houston! - Fixes astro check failing to find @astrojs/check and typescript when astro is installed in a directory outside the project tree (e.g. pnpm virtual store)
#17272 b428648 Thanks @matthewp! - Fixes island component paths so that extensionless imports (e.g. import { Counter } from '../components/Counter') resolve to the real file on disk, matching Vite's extension order and directory index resolution. This makes the include/exclude options of JSX renderer integrations (React, Preact, Solid) match components imported without a file extension, and removes the spurious React 19 "Invalid hook call" warning logged on every request in dev when include was set alongside another JSX renderer
#17279 2aeaa44 Thanks @astrobot-houston! - Fixes a bug where <Picture inferSize> with a remote image could fail with FailedToFetchRemoteImageDimensions when the image server rate-limits requests (e.g. HTTP 429). Remote dimensions are now resolved once per render instead of once per output format.
#17251 5240e26 Thanks @matthewp! - Hardens the handling of attribute rendering when using with custom elements.
#17248 429bd62 Thanks @astrobot-houston! - Fixes a crash when using Astro's getViteConfig with Vitest browser mode (e.g., Storybook vitest runner). Astro now skips dev server setup inside Vitest, preventing errors.
#17260 14524c0 Thanks @matthewp! - Fixes a regression where a <script> inside a component rendered through Astro.slots.render() was hoisted out of its original position instead of staying next to its component content
Updated dependencies [eb6f97e]:
- @astrojs/internal-helpers@0.10.1
- @astrojs/markdown-remark@7.2.1
- @astrojs/markdown-satteri@0.3.3

`v7.0.5`

Compare Source

Patch Changes

#17242 9c05ba4 Thanks @matthewp! - Fixes an error that could occur after the dev server restarts when using an adapter such as @astrojs/cloudflare, where a request would fail with a 500 referencing a missing pre-bundled dependency:

The file does not exist at "node_modules/.vite/deps_ssr/astro_compiler-runtime.js?v=6419660d" which is in the optimize deps directory. The dependency might be incompatible with the dep optimizer. Try adding it to `optimizeDeps.exclude`.

#17202 c6d254d Thanks @matthewp! - Refactors path alias resolution to use Vite's native tsconfigPaths option

This is an internal change with no expected impact on user projects. Astro now defers tsconfig and jsconfig paths alias resolution to Vite, keeping a small fallback for a few CSS cases Vite does not yet handle.
#17123 72e29bd Thanks @martrapp! - Fixes an issue where the ClientRouter wipes head elements after page transitions if the <head> contains a server:defer component.
#17232 257505e Thanks @matthewp! - Fixes a bug where <style> tags from components such as a content collection's Content could be silently dropped from the output when an await appeared before the component in an .astro file's markup.
#17193 a7352fd Thanks @jan-kubica! - Fixes the background dev server failing to start when astro is hoisted outside the project's node_modules (for example bun workspaces). The background process is now spawned from Astro's own resolved location instead of a path assumed under the project root.
#17255 581d171 Thanks @astrobot-houston! - Fixes prefetch not working for links inside server:defer components

`v7.0.4`

Compare Source

Patch Changes

#17212 7ba0bb1 Thanks @matthewp! - Ensures transition directive values are HTML-escaped when rendered on hydrated islands
#17224 dc5e52f Thanks @astrobot-houston! - Fixes trailing slash handling for dynamic file endpoints in dev mode. Dynamic file endpoints (e.g., src/pages/api/[name].json.ts) with trailingSlash: "always" incorrectly required a trailing slash in dev mode, returning 404 for /api/bar.json and 200 for /api/bar.json/.
#17067 23f9446 Thanks @fkatsuhiro! - Fixed a bug where the development toolbar did not output a warning even though the implicit ARIA role and the manually specified role were duplicated.
#17234 d5fbee8 Thanks @ocavue! - Adds support for sharp v0.35. pnpm users no longer need to approve sharp's build script (see allowBuilds) when on v0.35.
#17223 5970ef4 Thanks @astrobot-houston! - Fixes getCollection() returning empty in dev mode for large content collections (500k+ entries)
#17184 799e5cd Thanks @Princesseuh! - Upgrades the Rust compiler to the latest, which fixes some bugs. Refer to its changelog for more information.
#17208 da8b573 Thanks @matthewp! - Hardens forwarded header handling so the internal request helper validates X-Forwarded-Host against security.allowedDomains before trusting X-Forwarded-For for clientAddress. Previously it only checked that the header was present, which was inconsistent with the public createRequest helper. This aligns both code paths; behavior is unchanged for correctly configured proxies.

`v7.0.3`

Compare Source

Patch Changes

#17189 24d2c9e Thanks @astrobot-houston! - Fixes a bug where an error thrown inside one route's getStaticPaths() would prevent other valid routes from being matched in dev mode
#16932 8f4a3db Thanks @fkatsuhiro! - Fixes HMR for action files during development. Editing files in src/actions/ now takes effect on the next request without requiring a dev server restart.
#17087 fb0ab02 Thanks @jp-knj! - Fixes localized custom error pages in i18n projects so routes like /pt/404 are used for missing localized pages and return the correct status code

Patch Changes

#17151 ccceda3 Thanks @matthewp! - Fixes astro dev incorrectly starting in background mode for Warp terminal users. Hybrid environments like Warp are no longer treated as AI agents for auto-background detection.
#17158 164df87 Thanks @ematipico! - Fixes astro dev --background --host not listing the network addresses. The background server start output and astro dev status now show every exposed network URL, matching the foreground dev server.
#17141 d785b9d Thanks @astrobot-houston! - Fixes responsive image CSS overriding user styles defined inside CSS @layer blocks. The generated image styles are now wrapped in @layer astro.images, ensuring they have lower cascade priority than user-defined layers.
#17150 1a61386 Thanks @matthewp! - Fixes astro dev --background failing on Windows with "Failed to spawn background dev server process"

`v7.0.0`

Compare Source

Major Changes

#15819 cafec4e Thanks @delucis! - Upgrade to Vite v8
#16965 57ead0d Thanks @Princesseuh! - Makes 'jsx' the default value for compressHTML

Astro now strips whitespace from your HTML using JSX rules by default, the same way frameworks like React do. Whitespace and line breaks around elements are removed, but meaningful whitespace within a single line — like a space between two inline elements — is preserved. To keep a space that would otherwise be removed, write it explicitly in your source, for example with {" "}.

This can change rendered output where whitespace between inline elements was previously meaningful. To keep Astro's earlier behavior, set compressHTML: true for HTML-aware compression, or compressHTML: false to preserve all whitespace.
#16610 c63e7e4 Thanks @matthewp! - Adds background dev server management for AI coding agents.

When an AI coding agent is detected, astro dev now automatically starts the dev server as a detached background process. This prevents the dev server from blocking the agent's terminal and allows it to continue working while the server runs.

A lock file (.astro/dev.json) is written when the dev server starts, recording the server's URL, port, and PID. This prevents duplicate servers from being started for the same project.

New flag and subcommands

astro dev --background — Start the dev server as a background process (this is what runs automatically when an agent is detected).
astro dev stop — Stop a running background dev server.
astro dev status — Check if a dev server is running and display its URL, PID, and uptime.
astro dev logs — View logs from a background dev server. Use --follow (-f) to stream new output as it's written.

These allow you to start and manage dev servers programmatically and were designed with AI coding agents in mind.

What should I do?

No action is required. If you are not using an AI coding agent, astro dev behaves exactly as before. If you are using an agent, background mode is enabled automatically — the agent will receive the server URL and PID, and can use astro dev stop to shut it down.

To opt out of automatic background mode when an agent is detected, set the environment variable ASTRO_DEV_BACKGROUND=0 before running astro dev.

#17010 0606073 Thanks @ocavue! - Removes the @astrojs/db package as it is no longer maintained.

The @astrojs/db package were deprecated in v6.4.5 and is now removed. This means the astro db, astro login, astro logout, astro link, and astro init CLI commands have also been removed.

If you were using Astro DB in your project, remove @astrojs/db from your project's dependencies and replace it with one of the following alternatives:
- Node.js built-in SQLite: Node.js now includes a built-in node:sqlite module (available since Node.js v22.5.0). This is a good option if you are using the Node.js adapter and were using @astrojs/db for local SQLite storage.
- Drizzle ORM: If you were using @astrojs/db for its Drizzle-based schema and query API, you can use Drizzle directly with any supported database.
- Other database libraries: Use any database library that suits your deployment platform (e.g. Turso, PlanetScale, Neon).
#16462 c30a778 Thanks @Princesseuh! - Replaces the Go compiler with a Rust-based version.

The Rust-based Astro compiler (@astrojs/compiler-rs) is now the default compiler. This new compiler is faster and more reliable, leading to faster build times and iteration cycles during development.

This new compiler is more strict regarding invalid syntax. For example, unclosed HTML tags will now throw an error instead of being ignored. It also does not attempt to correct semantically invalid HTML anymore, instead leaving it to the browser to handle, similar to other tools or document.write() in JavaScript.

The previous Go-based compiler has been removed, along with the experimental.rustCompiler flag used to opt into the Rust compiler. If you were setting experimental.rustCompiler in your astro.config.mjs, you can now remove it. No other action is required.
#16966 6650ec2 Thanks @Princesseuh! - Makes Sätteri the default Markdown processor

Astro now renders .md files with satteri() from @astrojs/markdown-satteri, its native Markdown pipeline, instead of the remark/rehype pipeline. @astrojs/markdown-remark is no longer installed by default.

To keep using the remark/rehype pipeline, install @astrojs/markdown-remark and set it as your processor:
```
// astro.config.mjs
import { defineConfig } from 'astro/config';
import { unified } from '@&#8203;astrojs/markdown-remark';

export default defineConfig({
  markdown: {
    processor: unified(),
  },
});
```
The deprecated markdown.remarkPlugins, markdown.rehypePlugins, and markdown.remarkRehype options still work, but now require @astrojs/markdown-remark to be used.
#16877 3b7d76e Thanks @matthewp! - Enables advanced routing by default.

The advanced routing feature introduced behind a flag in v6.3.0 is no longer experimental and is now enabled by default.

This gives full control over how requests flow through your application, with first-class support for frameworks like Hono.

Advanced routing now uses src/fetch.ts as default entrypoint instead of src/app.ts.

If you were previously using this feature without a custom entrypoint, please configure fetchFile or rename your entrypoint to src/fetch.ts, and then remove the experimental flag from your Astro config:
```
import { defineConfig } from 'astro/config';

export default defineConfig({
  experimental {
-    advancedRouting: true,
  },
+  fetchFile: 'app.ts' // optional, you only need this if you cannot rename your entrypoint.
});
```
fetchFile is now a top-level config option instead of being nested under experimental.advancedRouting. If you were using a custom entrypoint, please update your Astro config to move its configuration:
```
// astro.config.mjs
export default defineConfig({
-  experimental: {
-    advancedRouting: {
-      fetchFile: 'my-custom-entrypoint.ts',
-    },
-  },
+  fetchFile: 'my-custom-entrypoint.ts',
})
```
You can also set fetchFile: null to disable the entrypoint if you are using src/fetch.ts for another purpose, or don’t need advanced routing features.

If you have been waiting for stabilization before using advanced routing, you can now do so.

Please see the advanced routing guide in docs for more about this feature.
#16725 10229f7 Thanks @ArmandPhilippot! - Removes deprecated APIs exported from astro:transitions.

In Astro 6.x, some helpers available in astro:transitions and astro:transitions/client were deprecated.

In Astro 7.0, the following APIs can no longer be used in your project:
- TRANSITION_BEFORE_PREPARATION
- TRANSITION_AFTER_PREPARATION
- TRANSITION_BEFORE_SWAP
- TRANSITION_AFTER_SWAP
- TRANSITION_PAGE_LOAD
- isTransitionBeforePreparationEvent()
- isTransitionBeforeSwapEvent()
- createAnimationScope()

What should I do?

Remove any occurrence of createAnimationScope():

-import { createAnimationScope } from 'astro:transitions';

Replace any occurrence of the other APIs using the lifecycle event names directly:

-import {
-	TRANSITION_AFTER_SWAP,
-	isTransitionBeforePreparationEvent,
-} from 'astro:transitions/client';

-console.log(isTransitionBeforePreparationEvent(event));
+console.log(event.type === 'astro:before-preparation');

-console.log(TRANSITION_AFTER_SWAP);
+console.log('astro:after-swap');

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fix(deps): update dependency astro to v7 [security]#545

fix(deps): update dependency astro to v7 [security]#545
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Astro: Reflected XSS via unescaped View Transition animation properties

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astro.config.mjs

src/pages/index.astro

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Astro: Cross-site scripting via unescaped transition:* directive values on hydrated islands

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Astro: XSS via unescaped spread attribute names in renderHTMLElement (incomplete fix for CVE-2026-54298)

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Scoping sources and hashes in your config

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New flag and subcommands

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renovate Bot commented Jul 21, 2026 •

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`astro.config.mjs`

`src/pages/index.astro`