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Description

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 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. This vulnerability is fixed in 2.57.1.

PUBLISHED Reserved 2026-04-09 | Published 2026-04-10 | Updated 2026-04-14 | Assigner GitHub_M




MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L

Problem types

CWE-755: Improper Handling of Exceptional Conditions

Product status

< 2.57.1
affected

References

github.com/...js/kit/security/advisories/GHSA-3f6h-2hrp-w5wx

github.com/...ommit/10d7b44425c3d9da642eecce373d0c6ef83b4fcd

github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.57.1

cve.org (CVE-2026-40074)

nvd.nist.gov (CVE-2026-40074)

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