sveltejs kit up to 2.49.4 Environment Variable ORIGIN uncaught exception

CVSS Meta Temp Score
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CTI Interest Score
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8.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in sveltejs kit up to 2.49.4. Affected is an unknown function of the component Environment Variable Handler. The manipulation of the argument ORIGIN results in uncaught exception. This vulnerability is identified as CVE-2025-67647. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in sveltejs kit up to 2.49.4. Affected is some unknown functionality of the component Environment Variable Handler. The manipulation of the argument ORIGIN with an unknown input leads to a uncaught exception vulnerability. CWE is classifying the issue as CWE-248. An exception is thrown from a function, but it is not caught. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.49.5, SvelteKit is vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions. From 2.44.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route (export const prerender = true). From 2.19.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route and you are using adapter-node without a configured ORIGIN environment variable, and you are not using a reverse proxy that implements Host header validation. This vulnerability is fixed in 2.49.5.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-67647 since 12/09/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

Upgrading to version 2.49.5 eliminates this vulnerability. Applying the patch d9ae9b00b14f5574d109f3fd548f960594346226 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Uncaught exception
CWE: CWE-248
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: kit 2.49.5
Patch: d9ae9b00b14f5574d109f3fd548f960594346226

Timelineinfo

12/09/2025 CVE reserved
01/15/2026 +37 days Advisory disclosed
01/15/2026 +0 days VulDB entry created
01/22/2026 +7 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-j62c-4x62-9r35
Status: Confirmed

CVE: CVE-2025-67647 (🔒)
GCVE (CVE): GCVE-0-2025-67647
GCVE (VulDB): GCVE-100-341406

Entryinfo

Created: 01/15/2026 20:58
Updated: 01/22/2026 05:45
Changes: 01/15/2026 20:58 (70), 01/22/2026 05:45 (14)
Complete: 🔍
Cache ID: 216::103

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