fix(deps): update dependency @sveltejs/kit@>=2.0.0 <2.20.6 to >=2.70.2 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@sveltejs/kit@>=2.0.0 <2.20.6 (source)	[>=2.60.1 → >=2.70.2](https://renovatebot.com/diffs/npm/@sveltejs%2fkit@>=2.0.0 <2.20.6/2.60.1/2.70.2)

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SvelteKit: Big remote form function payloads can cause Node process to crash

GHSA-wqjv-9729-c5q2

More information

Details

Big remote form function payloads can cause the Node process to crash. Doing this repeatedly can cause DoS.

Severity

• CVSS Score: 5.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-wqjv-9729-c5q2
• https://github.com/sveltejs/kit/pull/16219
• https://github.com/sveltejs/kit/commit/82b0370c793ac392cee5c2e28f4b8fed09c64582
• https://github.com/sveltejs/kit/releases/tag/@​sveltejs/kit@2.69.1
• https://github.com/sveltejs/kit/releases/tag/@​sveltejs/kit@3.0.0-next.7
• https://github.com/advisories/GHSA-wqjv-9729-c5q2

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

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SvelteKit: Prototype pollution in file input deletion path in remote-function forms

GHSA-866w-xmhq-wj7x

More information

Details

If you use remote form functions, have an input field of type file, and accept arbitrary user-controlled path names for the field, then you are vulnerable to a prototype pollution attack where the attacker can remove e.g. methods on the prototype.

Severity

• CVSS Score: 4.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7x
• https://github.com/sveltejs/kit/pull/16218
• https://github.com/sveltejs/kit/commit/df32f6fe86cdd0b68b650e3e4631e5896453dcd3
• https://github.com/sveltejs/kit/releases/tag/@​sveltejs/kit@2.69.1
• https://github.com/sveltejs/kit/releases/tag/@​sveltejs/kit@3.0.0-next.7
• https://github.com/advisories/GHSA-866w-xmhq-wj7x

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

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SvelteKit: ReDoS (O(n^2)) in content negotiation — unauthenticated DoS via the Accept header

CVE-2026-66062 / GHSA-29g2-3rmr-qm68

More information

Details

Impact

SvelteKit is vulnerable to remote CPU-exhaustion DoS attacks via specifically-crafted Accept headers. The impact is mitigated by default header length limits on most platforms, but in the case of raised or absent limits a denial of service is possible.

Patches

The vulnerability is patched in @sveltejs/kit version 2.70.2.

Severity

• CVSS Score: 5.3 / 10 (Medium)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-29g2-3rmr-qm68
• https://github.com/sveltejs/kit/commit/82712fc02c24b1dcf5b25d7a52129cd8455f04f5
• https://github.com/sveltejs/kit/releases/tag/@​sveltejs/kit@2.70.2
• https://github.com/advisories/GHSA-29g2-3rmr-qm68

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

⚠️ Renovate does not enforce Minimum Release Age for bump, lockfileUpdate, or rollback updates, so these are raised without a Minimum Release Age check. You will need to manually validate the Minimum Release Age for these package(s).

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Release Notes

sveltejs/kit (@​sveltejs/kit@>=2.0.0 <2.20.6)

v2.70.2

Compare Source

Patch Changes

• fix: prevent quadratic backtracking in Accept header content negotiation (#​1)

v2.70.1

Compare Source

Patch Changes

• docs: update links to hooks documentation (#​16417)

v2.70.0

Compare Source

Minor Changes

• feat: move defineEnvVars to @sveltejs/kit/env (#​16378)

Patch Changes

• fix: enable CSRF protection in builds with a non-production NODE_ENV value (#​16313)

v2.69.3

Compare Source

Patch Changes

• fix: detect destructured load and actions exports during type generation (#​16329)

• fix: ensure CSS URL references are absolute when paths.relative is false (#​16315)

• fix: align MAX_COOKIE_SIZE with RFC 6265bis (#​16322)

v2.69.2

Compare Source

Patch Changes

• fix: set define values on globalThis when running Vitest (#​16246)

v2.69.1

Compare Source

Patch Changes

• fix: prevent prototype pollution when deleting file inputs (#​16218)

• fix: prevent unhandled promise rejection (#​16219)

v2.69.0

Compare Source

Minor Changes

• feat: expose submitted property of remote forms (#​14811)

Patch Changes

• fix: clear issues and touched states on form reset (#​16163)

• fix: return undefined from fields.branch.issues() when only fields.branch.leaf has issues (#​16187)

v2.68.0

Compare Source

Minor Changes

• feat: expose RemoteFormEnhanceInstance and RemoteFormEnhanceCallback types (#​15816)

• feat: set value of submit fields when form is submitted (#​15979)

Patch Changes

• fix: skip native_navigation when __data.json returns 404 on a static fallback page (#​16135)

• fix: ignore third-party monkeypatches in pushState/replaceState warning detection (#​15267)

• fix: snapshot form fields on read (#​16150)

• fix: strip field prefix before erroring on duplicates (#​16151)

• fix: call reset function via prototype (#​16138)

• chore: fix navigation type hover info (#​16147)

v2.67.0

Compare Source

Minor Changes

• feat: add prerender.handleInvalidUrl option for invalid URLs discovered while crawling (#​16088)

Patch Changes

• fix: support exactOptionalPropertyTypes for optional form schema fields (#​15866)

• fix: avoid unnecessarily overriding a user's Vite 8 codeSplitting setting (#​16118)

v2.66.0

Compare Source

Minor Changes

• feat: precompress prerendered .md and .mdx files (#​15893)

• feat: warn the user when they forget to make boolean inputs optional in their form schemas (#​15804)

Patch Changes

• fix: blur active element before component update during navigation so that blur/focusout handlers fire while old component data is still valid (#​15452)

• fix: ensure base is available from $service-worker during development (#​15882)

• fix: use correct relative asset paths when rendering an error page for a missing __data.json request (#​15884)

• fix: preserve active for await consumers across query.live reconnects (#​16022)

• fix: settle query.live reconnect promise on all exit paths, preventing invalidateAll() from deadlocking when a live query is offline or interrupted (#​16022)

• fix: preserve last value when a query.live stream completes without yielding on reconnect (#​16022)

• fix: remove types: ['node'] from generated tsconfig to avoid errors when @types/node is not installed (#​15709)

• fix: prefer pages over endpoints when prerendering (#​16076)

• fix: restore snapshots after afterNavigate callbacks (#​16066)

• fix: support ws:/wss: and trusted-types-eval for CSP sources (#​15938)

• fix: omit empty file inputs from remote form data (#​15898)

• fix: fail early if a route with +page and +server is marked as prerenderable (#​16075)

• fix: wait a tick before resetting forms (#​15805)

• fix: preflight schemas apply correctly when chained before for (#​15863)

• fix: blank page in SPA mode when root layout load() throws (#​15798)

• fix: pass all unknown options from the sveltekit Vite plugin through to vite-plugin-svelte (#​16010)

v2.65.2

Compare Source

Patch Changes

• fix: throw an error when prerendering a root +server.js that returns a non-HTML response (#​15994)

• fix: decode base64-serialized fetch bodies before caching them for client-side replay (#​16034)

• fix: correctly access explicit dynamic public environment variables from prerendered pages and service workers (#​16024)

• fix: allow preloadCode to be called during initial page load (#​16028)

• fix: send cache-control: private, no-store on remote function responses so personalized query results can never be cached by shared caches (#​16020)

• fix: preserve the HTTP status and error body when a remote function request fails in transport (e.g. a 401/403 from a handle hook), instead of reporting a generic 500 (#​16021)

• fix: avoid loading universal nodes during build analysis when the app uses a hash router (#​16042)

• fix: correctly serve client entry during development when using the pnpm global virtual store (#​16045)

• fix: normalize path separators when comparing config (#​16037)

• fix: ensure building resolves correctly to allow avoiding build-time explicit environment variable validation (#​16058)

• fix: prevent unhandled promise rejections when remote function failures are consumed via current/error instead of await (#​16018)

v2.65.1

Compare Source

Patch Changes

• fix: avoid importing the Vite development client code into builds with a non-standard NODE_ENV (#​16023)

• fix: don't emit the unused bundle and stylesheet files when using bundleStrategy: 'inline' (#​16025)

• fix: reset queries before navigating when invalidateAll is set (#​16014)

• fix: regression in loading assets for absolute path apps (#​16026)

v2.65.0

Compare Source

Minor Changes

• feat: allow queries to refresh other queries (#​16012)

Patch Changes

• fix: dedupe remote data (#​15991)

• fix: skip client build if all routes have CSR disabled (#​15936)

v2.64.0

Compare Source

Minor Changes

• feat: allow commands to receive File objects (#​15978)

Patch Changes

• fix: avoid server components from being bundled if SSR is turned off for a route (#​15982)

v2.63.1

Compare Source

Patch Changes

• fix: use SSE for query.live (#​15957)

• fix: use forward slashes in the generated env.d.ts import path on Windows (#​15977)

• fix: allow $app/environment with a warning when explicitEnvironmentVariables is enabled (#​15980)

• fix: avoid importing Vite while validating explicit environment variables (#​15953)

• docs: adjust the release version of explicit env vars (#​15968)

• fix: ensure version is defined when importing from $app/env with explicit environment variables (#​15971)

v2.63.0

Compare Source

Minor Changes

• feat: explicit env vars (#​15934)

Patch Changes

• fix: remove check for svelte.config.js before running sync (#​15946)

• fix: generate a placeholder tsconfig.json to squelch sync-time warnings (#​15948)

• fix: allow use of $app/env/public in service workers (#​15950)

v2.62.0

Compare Source

Minor Changes

• feat: support passing Svelte(Kit) config via Vite plugin (#​15944)

Patch Changes

• fix: preserve multiple Set-Cookie headers on 304 responses (#​15902)

• fix: preload for anchor elements that were just previously preloaded (#​15915)

• fix: catch load function streaming errors on the client (#​15929)

• fix: avoid generating the _app/env.js module if public dynamic environment variables are not used by the app (#​15940)

v2.61.1

Compare Source

Patch Changes

• fix: regression where routes starting and ending with a route group are not matched correctly (#​15903)

v2.61.0

Compare Source

Minor Changes

• breaking: the .run() method has been removed from remote queries on both the client and the server. Use await query() directly instead — it now works everywhere (#​15779)

• feat: remote queries can now be awaited in any context (event handlers, module scope, async callbacks), not just inside reactive contexts. The cache is shared across reactive and non-reactive subscribers, so awaiting a query in an event handler will dedupe with components that have already subscribed to the same query. (#​15779)

• feat: live query instances are now themselves async-iterable (#​15878)

• feat: add programmatic submit method to form remote function instances (#​15657)

• feat: pass form remote function instance into enhance callback (#​15657)

Patch Changes

• fix: resolve the app payload without using process.env.NODE_ENV (#​15852)

• fix: support exactOptionalPropertyTypes for optional route params (#​15825)

• fix: correctly send true value to the server for 'submit' and 'hidden' form fields (#​15858)

• fix: avoid build warnings about undefined universal hooks (#​15895)

• fix: prefer default error page when failing to decode the URL pathname (#​15744)

• fix: disable link prefetching on slow internet connections (#​15885)

• fix: allow routes ending with optional parameters next to more specific routes (#​15861)

• fix: remove reliance on Content-Length header in deserialize_binary_form, which caused failures when proxies (e.g. Vercel, Azure) strip the header and use chunked transfer encoding (#​15796)

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