chore(deps): update dependency @sveltejs/kit to v2.20.6 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@sveltejs/kit (source)	2.8.5 -> 2.20.6

GitHub Vulnerability Alerts

CVE-2025-32388

Summary

Unsanitized search param names cause XSS vulnerability. You are affected if you iterate over all entries of event.url.searchParams inside a server load function. Attackers can exploit it by crafting a malicious URL and getting a user to click a link with said URL.

Details

SvelteKit tracks which parameters in event.url.searchParams are read inside server load functions. If the application iterates over the these parameters, the uses.search_params array included in the boot script (embedded in the server-rendered HTML) will have any search param name included in unsanitized form.

packages/kit/src/runtime/server/utils.js:150 has the stringify_uses(node) function which prints these out.

Reproduction

In a +page.server.js or +layout.server.js:

/** @​type {import('@​sveltejs/kit').Load} */
export function load(event) {
  const values = {};

  for (const key of event.url.searchParams.keys()) {
    values[key] = event.url.searchParams.get(key);
  }
}

If a user visits the page in question via a link containing ?</script/><script>window.pwned%3D1</script/>, the </script> will be included verbatim in the payload, causing the embedded script to be executed.

It is not necessary to return the parameter value from load or render it in the page, only to read it (which causes it to be tracked as a dependency) while load is running.

Impact

Any application that iterates over all values in event.url.searchParams in a load function in +page.server.js or +layout.server.js (directly or indirectly) is vulnerable to XSS.

---

Release Notes

sveltejs/kit (@​sveltejs/kit)

v2.20.6

Compare Source

Patch Changes

• fix: escape names of tracked search parameters (d3300c6a67908590266c363dba7b0835d9a194cf)

v2.20.5

Compare Source

Patch Changes

• allow HandleServerError hook to access getRequestEvent (#​13666)

• fix: prevent Rollup warnings for undefined hooks (#​13687)

v2.20.4

Compare Source

Patch Changes

• chore: remove internal class-replacement hack that isn't needed anymore (#​13664)

v2.20.3

Compare Source

Patch Changes

• fix: only call afterNavigate once on app start when SSR is disabled (#​13593)

v2.20.2

Compare Source

Patch Changes

• fix: allow non-prerendered API endpoint calls during reroute when prerendering (#​13616)

v2.20.1

Compare Source

Patch Changes

• fix: avoid using top-level await (#​13607)

v2.20.0

Compare Source

Minor Changes

• feat: add getRequestEvent to $app/server (#​13582)

v2.19.2

Compare Source

Patch Changes

• fix: lazily load CSS for dynamically imported components (#​13564)

v2.19.1

Compare Source

Patch Changes

• fix: allow reroute to point to prerendered route (#​13575)

v2.19.0

Compare Source

Minor Changes

• feat: provide fetch to reroute (#​13549)

Patch Changes

• chore: cache reroute results (#​13548)

v2.18.0

Compare Source

Minor Changes

• feat: allow async reroute (#​13520)

• feat: provide normalizeUrl helper (#​13539)

Patch Changes

• fix: correct navigation history with hash router and ensure load functions are rerun on user changes to URL hash (#​13492)

• fix: include universal load assets as server assets (#​13531)

• fix: Include root layout and error nodes even when apps have only prerendered pages (#​13522)

• fix: correctly preload data on mousedown/touchstart if code was preloaded on hover (#​13530)

v2.17.3

Compare Source

Patch Changes

• fix: avoid simulated CORS errors with non-HTTP URLs (#​13493)

• fix: correctly preload links on mousedown/touchstart (#​13486)

• fix: load CSS when using server-side route resolution (#​13498)

• fix: correctly find shared entry-point CSS files during inlining (#​13431)

v2.17.2

Compare Source

Patch Changes

• fix: add promise return type to the enhance action callback (#​13420)

• fix: change server-side route resolution endpoint (#​13461)

v2.17.1

Compare Source

Patch Changes

• fix: make route resolution imports root-relative if paths.relative option is false (#​13412)

v2.17.0

Compare Source

Minor Changes

• feat: validate values for cache-control and content-type headers in dev mode (#​13114)

• feat: support server-side route resolution (#​13379)

Patch Changes

• chore: don't error during development when using use:enhance with +server as some third party libraries make it possible to POST forms to it (#​13397)

• fix: skip hooks for server fetch to prerendered routes (#​13377)

• fix: ignore non-entry-point CSS files during inlining (#​13395)

• fix: default server fetch to use prerendered paths (#​13377)

v2.16.1

Compare Source

Patch Changes

• fix: avoid overwriting headers for sub-requests made while loading the error page (#​13341)

• fix: correctly resolve index file entrypoints such as src/service-worker/index.js (#​13354)

• fix: correctly handle relative anchors when using the hash router (#​13356)

v2.16.0

Compare Source

Minor Changes

• feat: add ability to invalidate a custom identifier on goto() (#​13256)

• feat: remove the postinstall script to support pnpm 10 (#​13304)

  NOTE: users should add "prepare": "svelte-kit sync" to their package.json in order to avoid the following warning upon first running Vite:

  ▲ [WARNING] Cannot find base config file "./.svelte-kit/tsconfig.json" [tsconfig.json]
  
      tsconfig.json:2:12:
        2 │   "extends": "./.svelte-kit/tsconfig.json",
          ╵              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• feat: provide PageProps and LayoutProps types (#​13308)

Patch Changes

• perf: shorten chunk file names (#​13003)

• fix: strip internal data before passing URL to reroute (#​13092)

• fix: support absolute URLs and reroutes with data-sveltekit-preload-code="viewport" (#​12217)

• fix: use current window.fetch for server load fetch requests (#​13315)

• fix: resolve symlinks when handling routes (#​12740)

• fix: prevent infinite reload when using the hash router and previewing /index.html (#​13296)

• fix: service worker base path in dev mode (#​12577)

• chore: error during development when using use:enhance with +server (#​13197)

• chore: add most common status codes to redirect() JS documentation (#​13301)

• fix: correctly link to assets inlined by the inlineStyleThreshold option (#​13068)

• fix: fall back to importing dynamic dependencies relative to SvelteKit package (#​12532)

• fix: use arrow function types over bound funcs (#​12955)

• fix: correctly navigate when hash router is enabled and the browser encodes extra hashes (#​13321)

v2.15.3

Compare Source

Patch Changes

• fix: fix race-condition when not using SSR when pressing back before initial load (#​12925)

• fix: remove ":$" from virtual module ids to allow dev server to work with proxies (#​12157)

• fix: upgrade esm-env to remove warning when NODE_ENV is not set (#​13291)

• fix: handle Redirect thrown from root layout load function when client-side navigating to a non-existent page (#​12005)

• fix: make param matchers generated type import end with .js (#​13286)

v2.15.2

Compare Source

Patch Changes

• fix: correctly notify page store subscribers (#​13205)

• fix: prerender data when there is no server load but the trailingSlash option is set from the server (#​13262)

• fix: correctly remove navigation callbacks when returning function in onNavigate (#​13241)

v2.15.1

Compare Source

Patch Changes

• fix: add CSP hashes/nonces to inline styles when using bundleStrategy: 'inline' (#​13232)

• fix: silence dev/prod warning during sync (#​13244)

v2.15.0

Compare Source

Minor Changes

• feat: add bundleStrategy: 'inline' option (#​13193)

v2.14.1

Compare Source

Patch Changes

• fix: do not mutate URL during reroute logic (#​13222)

v2.14.0

Compare Source

Minor Changes

• feat: add hash-based routing option (#​13191)

Patch Changes

• fix: create new URL when calling goto(...), to handle case where URL is mutated (#​13196)

v2.13.0

Compare Source

Minor Changes

• feat: add bundleStrategy: 'split' | 'single' option (#​13173)

v2.12.2

Compare Source

Patch Changes

• fix: correctly resolve no hooks file when a similarly named directory exists (#​13188)

• fix: correctly resolve $app/state on the server with Vite 5 (#​13192)

v2.12.1

Compare Source

Patch Changes

• fix: replace navigating.current.<x> with navigating.<x> (#​13174)

v2.12.0

Compare Source

Minor Changes

• feat: add $app/state module (#​13140)

Patch Changes

• chore: specify the route ID in the error message during development when making a form action request to a route without form actions (#​13167)

v2.11.1

Compare Source

Patch Changes

• fix: adhere to Vite build.minify setting when building the service worker (#​13143)

v2.11.0

Compare Source

Minor Changes

• feat: transport custom types across the server/client boundary (#​13149)

Patch Changes

• fix: correctly resolve hooks file when a similarly named directory exists (#​13144)

v2.10.1

Compare Source

Patch Changes

• fix: export init hook from get_hooks (#​13136)

v2.10.0

Compare Source

Minor Changes

• feat: server and client init hook (#​13103)

Patch Changes

• fix: prevent hooks exported from hooks.js from overwriting hooks from hooks.server.js (#​13104)

v2.9.1

Compare Source

Patch Changes

• fix: correctly match route groups preceding optional parameters (#​13099)

v2.9.0

Compare Source

Minor Changes

• feat: Vite 6 support (#​12270)

Patch Changes

• fix: transform link[rel='shortcut icon'] and link[rel='apple-touch-icon'] to be absolute to avoid console error when navigating (#​13077)

---

Configuration

📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Preview	Comments	Updated (UTC)
code-block-embed	Ready	Preview	Comment	Nov 11, 2025 2:12am

[codesandbox]

Review or Edit in CodeSandbox

Open the branch in Web Editor • VS Code • Insiders

Open Preview