@sveltejs/kit: Unvalidated redirect in handle hook causes Denial-of-Service
`redirect`, when called from inside the `handle` server hook with a location parameter containing characters that are invalid in a HTTP header, will cause an unhandled `TypeError`. This could result in DoS on some platforms, especially if the location passed to `redirect` contains unsanitized user input.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-40074US | high7.5 | — | ||
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.57.1, redirect, when called from inside the handle server hook with a l… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/sveltejs/kitPACKAGE
- https://github.com/sveltejs/kit/commit/10d7b44425c3d9da642eecce373d0c6ef83b4fcdWEB
- https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.57.1WEB
- https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.57.1WEB
- https://github.com/sveltejs/kit/security/advisories/GHSA-3f6h-2hrp-w5wxWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-40074ADVISORY
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