SvelteKit’s invalidated redirect in handle hook causes Denial-of-Service_CVE-2026-40074

6.3 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-40074

Source GitHub_M

Published Apr 10, 2026 at 16:26

Affected Product

Vendor sveltejs

Product kit

Version < 2.57.1

Affected Versions sveltejs kit < 2.57.1

CWE Classification

CWE-755

References

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    "published": "2026-04-10T16:26:07.068Z",
    "modified": "2026-04-10T16:26:07.068Z",
    "type": "cve",
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