MEDIUM
GHSA-3f6h-2hrp-w5wx
@sveltejs/kit: Unvalidated redirect in handle hook causes Denial-of-Service
Quick fix
GHSA-3f6h-2hrp-w5wx — @sveltejs/kit: upgrade to the fixed version with the command below.
npm install @sveltejs/kit@2.57.1Details
`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.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/sveltejs/kit/security/advisories/GHSA-3f6h-2hrp-w5wx[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-40074[ADVISORY]
- https://github.com/sveltejs/kit/commit/10d7b44425c3d9da642eecce373d0c6ef83b4fcd[WEB]
- https://github.com/sveltejs/kit[PACKAGE]
- https://github.com/sveltejs/kit/releases/tag/%40sveltejs%2Fkit%402.57.1[WEB]
- https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.57.1[WEB]