CVE-2026-40074

Summary

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.

Affected Software

Weaknesses

• CWE-755: CWE-755: Improper Handling of Exceptional Conditions

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: partial

References

• https://github.com/sveltejs/kit/security/advisories/GHSA-3f6h-2hrp-w5wx
• https://github.com/sveltejs/kit/commit/10d7b44425c3d9da642eecce373d0c6ef83b4fcd
• https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.57.1

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