← Vulnerability feed

Vulnerability record · CVE-2026-40074 · published 10 April 2026

CVE-2026-40074: Svelte kit vulnerability

Svelte · Kit

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.

6.3 CVSS 4.0 Medium EPSS 0.61% · top 52.9% CWE-755 · CWE-755
6.3CVSS 4.0 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/sveltejs/kit/commit/10d7b44425c3d9da642eecce373d0c6ef83b4fcd Patch
https://github.com/sveltejs/kit/releases/tag/@sveltejs/[email protected] ProductRelease Notes
https://github.com/sveltejs/kit/security/advisories/GHSA-3f6h-2hrp-w5wx Vendor Advisory

Track CVE-2026-40074 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.4CVE-2025-67647Svelte adapter-node server-side request forgery (ssrf) vulnerabilitySvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.49.5, SvelteKit is vulnerable to a serve…EPSS 0.53%8.2CVE-2026-40073Svelte kit allocation without limits vulnerabilitySvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.57.1, under certain circumstances, reque…EPSS 0.96%8.2CVE-2026-22803Svelte kit allocation without limits vulnerabilitySvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From 2.49.0 to 2.49.4, the experimental form remote…EPSS 0.60%7.5CVE-2024-23641Svelte adapter-node improper input validation vulnerabilitySvelteKit is a web development kit. In SvelteKit 2, sending a GET request with a body eg `{}` to a built and previewed/hosted sveltekit app throws `R…EPSS 0.76%7.8CVE-2024-29748Android Pixel logic error allows local privilege escalationCVE-2024-29748 is a logic error in Android code that permits bypassing a security check, leading to local escalation of privilege. It affects Google …KEVEPSS 0.67%analysed9.8CVE-2020-7247OpenSMTPD MAIL FROM command injection allows remote root code executionOpenSMTPD 6.6, as shipped in OpenBSD 6.6 and other products, mishandles input validation in smtp_mailaddr in smtp_session.c, returning an incorrect v…KEVEPSS 99%analysed8.6CVE-2018-0155Cisco Catalyst BFD offload incomplete header handling denial of serviceCisco Catalyst 4500 and 4500-X series switches mishandle incomplete BFD headers in the BFD offload implementation, causing the iosd process to crash.…KEVEPSS 7.7%analysed8.8CVE-2021-38003Google Chrome V8 heap corruption via crafted HTML pageGoogle Chrome before 95.0.4638.69 contains an inappropriate implementation in the V8 JavaScript engine that can lead to heap corruption. A remote att…KEVEPSS 39%analysed

Source: NIST National Vulnerability Database (record CVE-2026-40074), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.