chore(deps): update dependency @sveltejs/kit to v2.60.1 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@sveltejs/kit (source)	2.49.1 → 2.60.1

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@​sveltejs/kit has memory amplification DoS vulnerability in Remote Functions binary form deserializer (application/x-sveltekit-formdata)

CVE-2026-22803 / GHSA-j2f3-wq62-6q46

More information

Details

Summary

The experimental form remote function uses a binary data format containing a representation of submitted form data. A specially-crafted payload can cause the server to allocate a large amount of memory, causing DoS via memory exhaustion.

Details

When a form is submitted to a remote function endpoint, the SvelteKit client encodes the data using a custom format, and POSTs it to the endpoint as a request with an application/x-sveltekit-formdata content type.

The first few bytes of the request body encode the length of the data. SvelteKit will attempt to read the request body up until the specified offset, but if the body is not yet available then an array buffer of that size will be created eagerly to accommodate it as it arrives.

An attacker can force this code path by sending a small payload that specifies a large data length, then stalling the connection. The resulting array buffer will be held in memory, potentially causing memory exhaustion.

Impact

• Vulnerability type: Availability / memory exhaustion (memory amplification).
• Who is impacted: SvelteKit apps with experimental.remoteFunctions enabled, and that expose a reachable Remote Form endpoint.
• Attack: an unauthenticated attacker can repeatedly open connections, send only the 8-byte header/prefix (with large data_length), and stall the body to hold large allocations, exhausting memory.

Severity

• CVSS Score: 8.2 / 10 (High)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46
• https://github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5
• https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.49.5
• https://nvd.nist.gov/vuln/detail/CVE-2026-22803
• https://github.com/sveltejs/kit/releases/tag/@​sveltejs%2Fadapter-node@5.5.1
• https://github.com/advisories/GHSA-j2f3-wq62-6q46

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

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SvelteKit is vulnerable to denial of service and possible SSRF when using prerendering

CVE-2025-67647 / GHSA-j62c-4x62-9r35

More information

Details

Summary

Versions of SvelteKit are vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions.

Details

Affected versions from 2.44.0 onwards are vulnerable to DoS if:

• your app has at least one prerendered route (export const prerender = true)

Affected versions from 2.19.0 onwards are vulnerable to DoS and SSRF if:

• your app has at least one prerendered route (export const prerender = true)
• AND you are using adapter-node without a configured ORIGIN environment variable, and you are not using a reverse proxy that implements Host header validation

Impact

The DoS causes the running server process to end.

The SSRF allows access to internal services that can be reached without authentication when fetched from SvelteKit's server runtime.

It is also possible to obtain an SXSS via cache poisoning, by forcing a potential CDN to cache an XSS returned by the attacker's server (the latter being able to specify the cache-control of their choice).

Credits

• Allam Rachid (zhero;)
• Allam Yasser (inzo)
• d-xuan (wednesday)

Severity

• CVSS Score: 8.4 / 10 (High)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:N

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-j62c-4x62-9r35
• https://github.com/sveltejs/kit/commit/d9ae9b00b14f5574d109f3fd548f960594346226
• https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fadapter-node%405.5.1
• https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.49.5
• https://nvd.nist.gov/vuln/detail/CVE-2025-67647
• https://github.com/advisories/GHSA-j62c-4x62-9r35

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

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CPU exhaustion in SvelteKit remote form deserialization (experimental only)

GHSA-88qp-p4qg-rqm6

More information

Details

Versions of @sveltejs/kit prior to 2.52.2 with remote functions enabled are vulnerable to CPU exhaustion. Malformed form data can cause the server to become unresponsive while processing a request, resulting in denial of service.

Only applications using both experimental.remoteFunctions and form are vulnerable.

Severity

• CVSS Score: 6.9 / 10 (Medium)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-88qp-p4qg-rqm6
• https://github.com/sveltejs/kit/commit/3e607b314aec9e5f278d32847945b8b6323e1cb8
• https://github.com/sveltejs/kit/releases/tag/@​sveltejs/kit@2.52.2
• https://github.com/advisories/GHSA-88qp-p4qg-rqm6

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

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@​sveltejs/kit: query.batch cross-talk

GHSA-hgv7-v322-mmgr

More information

Details

query.batch() could, under very rare and specific timings, cause concurrent requests from different users to merge and resolve under single request context, enabling cross-user data disclosure.

Severity

• CVSS Score: 5.9 / 10 (Medium)
• Vector String: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-hgv7-v322-mmgr
• https://github.com/advisories/GHSA-hgv7-v322-mmgr

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

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Release Notes

sveltejs/kit (@​sveltejs/kit)

v2.60.1

Compare Source

Patch Changes

• chore: bump svelte and devalue (#​15836)

• fix: prevent query.batch cross-talk (dadaefc)

v2.60.0

Compare Source

Minor Changes

• feat: allow 'submit' and 'hidden' form fields to accept numbers and booleans (#​15802)

• feat: warn on unread form remote function validation issues (#​15653)

Patch Changes

• fix: abort navigation after async rendering if obsolete (#​15811)

• fix: skip refreshing queries on full-page reload form submissions (#​15803)

v2.59.1

Compare Source

Patch Changes

• fix: resolve paths to route files with the letter drive on Windows (#​15793)

v2.59.0

Compare Source

Minor Changes

• feat: support query.batch in requested(...) (#​15751)

• breaking: on the server, make the promise returned from refresh represent adding the refresh to the map, not the time it takes to run the remote function (#​15705)

• feat: experimental query.live function (#​15705)

Patch Changes

• fix: unwrap Promise in RemoteCommand output type (#​15771)

• fix: empty call to .updates() on a command/form invocation means "don't update anything" (#​15705)

• fix: form.fields.foo.as('checkbox', default_value) now works (#​15752)

• fix: remote forms with default values defined by field.as('text', defaultValue) now correctly reset to the provided default values once submitted (#​15753)

• fix: make sure queries always get started correctly (#​15705)

• fix: allow plain functions as overrides in updates (#​15705)

v2.58.0

Compare Source

Minor Changes

• breaking: require limit in requested (as originally intended) (#​15739)

• feat: RemoteQueryFunction gains an optional third generic parameter Validated (defaulting to Input) that represents the argument type after schema validation/transformation (#​15739)

• breaking: requested now yields { arg, query } entries instead of the validated argument (#​15739)

Patch Changes

• fix: allow query().current, .error, .loading, and .ready to work in non-reactive contexts (#​15699)

• fix: prevent deep_set crash on nullish nested values (#​15600)

• fix: restore correct RemoteFormFields typing for nullable array fields (e.g. when a schema uses .default([])), so .as('checkbox') and friends work again (#​15723)

• fix: don't warn about removed SSI comments in transformPageChunk (#​15695)

  Server-side include (SSI) directives like <!--#include virtual="..." --> are HTML comments that are replaced by servers such as nginx. Previously, removing them in transformPageChunk would trigger a false positive warning about breaking Svelte's hydration. Since SSI comments always start with <!--# and Svelte's hydration comments never do, they can be safely excluded from the check.

• Change enhance function return type from void to MaybePromise. (#​15710)

• fix: throw an error when resolve is called with an external URL (#​15733)

• fix: avoid FOUC for CSR-only pages by loading styles and fonts before CSR starts (#​15718)

• fix: reset form result on redirect (#​15724)

v2.57.1

Compare Source

Patch Changes

• fix: better validation for redirect inputs (10d7b44)

• fix: enforce BODY_SIZE_LIMIT on chunked requests (3202ed6)

• fix: use default values as fallbacks (#​15680)

• fix: relax form typings for union types (#​15687)

v2.57.0

Compare Source

Minor Changes

• feat: return boolean from submit to indicate submission validity for enhanced form remote functions (#​15530)

Patch Changes

• fix: use array type for select fields that accept multiple values (#​15591)

• fix: silently 404 Chrome DevTools workspaces request in dev and preview (#​15656)

• fix: config.kit.csp.directives['trusted-types'] requires 'svelte-trusted-html' (and 'sveltekit-trusted-url' when a service worker is automatically registered) if it is configured (#​15323)

• fix: avoid inlineDynamicImports ignored with codeSplitting warning when using Vite 8 (#​15647)

• fix: reimplement treeshaking non-dynamic prerendered remote functions (#​15447)

v2.56.1

Compare Source

Patch Changes

• chore: update JSDoc (#​15640)

v2.56.0

Compare Source

Minor Changes

• breaking: rework client-driven refreshes (#​15562)

• breaking: stabilize remote function caching by sorting object keys (#​15570)

• breaking: add run() method to queries, disallow awaiting queries outside render (#​15533)

• feat: support TypeScript 6.0 (#​15595)

• breaking: isolate command-triggered query refresh failures per-query (#​15562)

• feat: use hydratable for remote function transport (#​15533)

• feat: allow form fields to specify a default value (field.as(type, value)) (#​15577)

Patch Changes

• fix: don't request new data when .refresh is called on a query with no cache entry (#​15533)

• fix: allow using multiple remote functions within one async derived (#​15561)

• fix: avoid false-positive overridden Vite base setting warning when setting a paths.base in svelte.config.js (#​15623)

• fix: manage queries in their own $effect.root (#​15533)

• fix: avoid inlineDynamicImports deprecation warning when building the service worker with Vite 8 (#​15550)

• fix: correctly escape backticks when precomputing CSS (#​15593)

• fix: discard obsolete forks before finishing navigation (#​15634)

• chore: tighten up override implementation (#​15562)

• fix: ensure the default Svelte 5 error.svelte file uses runes mode (#​15609)

• fix: deduplicate same-cache-key batch calls during SSR (#​15533)

• fix: decrement pending_count when form callback doesn't call submit() (#​15520)

v2.55.0

Compare Source

Minor Changes

• feat: page and layout params with matchers are now type narrowed in $app/types, leading to better type safety when working with params in $app/types, $app/state, and hooks. (#​15502)

v2.54.0

Compare Source

Minor Changes

• feat: allow error boundaries to catch errors on the server (#​15308)

Patch Changes

• chore: upgrade devalue (#​15535)

• fix: don't wait for remote functions that are not awaited in the template (#​15280)

• feat: allow resolve() to accept pathnames with a search string and/or hash (#​15458)

• chore: remove deprecation warnings for config.kit.files.* options when validating the Svelte config file (#​15482)

• fix: handles form target attribute in remote form redirects (#​15457)

v2.53.4

Compare Source

Patch Changes

• fix: avoid Vite warning about unknown codeSplitting option (#​15451)

v2.53.3

Compare Source

Patch Changes

• fix: prevent overlapping file metadata in remote functions form (faba869)

v2.53.2

Compare Source

Patch Changes

• fix: server-render nested form value sets (#​15378)

• fix: use deep partial types for form remote functions .value() and .set(...) (#​14837)

• fix: provide correct url info to remote functions (#​15418)

• fix: allow optional types for remote query/command/prerender functions (#​15293)

• fix: allow commands in more places (#​15288)

v2.53.1

Compare Source

Patch Changes

• fix: address warning about inlineDynamicImports when using Vite 8 (#​15403)

v2.53.0

Compare Source

Minor Changes

• feat: support Vite 8 (#​15024)

Patch Changes

• fix: remove event listeners on form attachment cleanup (#​15286)

• fix: apply queries refreshed in a form remote function when a redirect is thrown (#​15362)

v2.52.2

Compare Source

Patch Changes

• fix: validate form file information to prevent amplification attacks (3e607b3)

• chore: upgrade devalue and svelte (#​15339)

• fix: parse file offset table more strictly (f47c01b)

v2.52.0

Compare Source

Minor Changes

• feat: match function to map a path back to a route id and params (#​14997)

Patch Changes

• fix: respect scroll-margin when navigating to a url-supplied anchor (#​15246)

• fix: resolve will narrow types to follow trailing slash page settings (#​15027)

v2.51.0

Compare Source

Minor Changes

• feat: add scroll property to NavigationTarget in navigation callbacks (#​15248)

  Navigation callbacks (beforeNavigate, onNavigate, and afterNavigate) now include scroll position information via the scroll property on from and to targets:

  • from.scroll: The scroll position at the moment navigation was triggered
  • to.scroll: In beforeNavigate and onNavigate, this is populated for popstate navigations (back/forward) with the scroll position that will be restored, and null for other navigation types. In afterNavigate, this is always the final scroll position after navigation completed.

  This enables use cases like animating transitions based on the target scroll position when using browser back/forward navigation.

• feat: hydratable's injected script now works with CSP (#​15048)

Patch Changes

• fix: put preloads before styles (#​15232)

• fix: suppress false-positive inner content warning when children prop is forwarded to a child component (#​15269)

• fix: fetch not working when URL is same host but different than paths.base (#​15291)

• fix: navigate to hash link when base element is present (#​15236)

• fix: avoid triggering handleError when redirecting in a remote function (#​15222)

• fix: include test directory in generated tsconfig.json alongside existing tests entry (#​15254)

• fix: generate tsconfig.json using the value of kit.files.src (#​15253)

v2.50.2

Compare Source

Patch Changes

• fix: ensure inlined CSS follows paths.assets and paths.relative settings (#​15153)

• fix: emit script CSP nonces when unsafe-inline is present if strict-dynamic is also present (#​15221)

• fix: re-export browser/dev from esm-env (#​15206)

• fix: use validated args in batch resolver in both csr and ssr (#​15215)

• fix: ensure CSS inlining includes components that are conditionally rendered (#​15153)

• fix: only match rest params with matchers when the matcher matches (#​15216)

• fix: properly handle percent-encoded anchors (e.g. <a href="#sparkles-%E2%9C%A8">) during prerendering. (#​15231)

v2.50.1

Compare Source

Patch Changes

• fix: include hooks.server and hooks.universal as explicit Vite build inputs to ensure assets imported by hooks files are correctly discovered (#​15178)

• fix: improves fields type for generic components (#​14974)

• fix: preload links if href changes (#​15191)

v2.50.0

Compare Source

Minor Changes

• breaking: remove buttonProps from experimental remote form functions; use e.g. <button {...myForm.fields.action.as('submit', 'register')}>Register</button> button instead (#​15144)

v2.49.5

Compare Source

Patch Changes

• fix: avoid overriding Vite default base when running Vitest 4 (#​14866)

• fix: ensure url decoded pathnames are not mistaken as rerouted requests (d9ae9b0)

• fix: add length checks to remote forms (8ed8155)

v2.49.4

Compare Source

Patch Changes

• fix: support instrumentation for vite preview (#​15105)

• fix: support for URLSearchParams.has(name, value) overload (#​15076)

• fix: put forking behind experimental.forkPreloads (#​15135)

v2.49.3

Compare Source

Patch Changes

• fix: avoid false-positive Vite config overridden warning when using Vitest 4 (#​15121)

• fix: add typescript as an optional peer dependency (#​15074)

• fix: use hasOwn check when deep-setting object properties (#​15127)

v2.49.2

Compare Source

Patch Changes

• fix: Stop re-loading already-loaded CSS during server-side route resolution (#​15014)

• fix: posixify the instrumentation file import on Windows (#​14993)

• fix: Correctly handle shared memory when decoding binary form data (#​15028)

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