CVE-2026-128118
SvelteKit: Build-time server-only module import guard could fail, resulting in server secrets being statically replaced in client bundle
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From version 3.0.0 until 3.1.1, the build-time server-only module guard did not treat src/params.js as a client entry point even though parameter matchers can run in the browser. Server-only modules imported through src/params.js could consequently enter the client bundle, where statically replaced private environment values or other server secrets could be exposed. This issue is fixed in 3.1.1.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| kit sveltejs |
>= 3.0.0, < 3.1.1 (affected) | CNA: GitHub_M |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/sveltejs/kit/security/advisories/GHSA-m9j8-jcmv-hp69CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/sveltejs/kit/commit/ae07803806f75b8b5662ae4ab92934ca1356fd84CNA: GitHub_M · x_refsource_MISC
- https://github.com/sveltejs/kit/releases/tag/@sveltejs/[email protected]CNA: GitHub_M · x_refsource_MISC
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