CVE-2026-40073
High
Description
SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.57.1, under certain circumstances, requests could bypass the BODY_SIZE_LIMIT on SvelteKit applications running with adapter-node. This bypass does not affect body size limits at other layers of the application stack, so limits enforced in the WAF, gateway, or at the platform level are unaffected. This vulnerability is fixed in 2.57.1.
SeverityHigh
CVSS7.5
Exploit probability45. percentile0.5%
Product
Svelte Kit
PublishedApr 10, 2026
First seenApr 10, 2026
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- svelte kit2.57.1 or later
- @sveltejs/kit2.57.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| svelte kit | v < 2.57.1 | 2.57.1 |
| @sveltejs/kitnpm | v < 2.57.1 | 2.57.1 |
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