High 8.2Published Apr 10, 2026

CVE-2026-40073SvelteKit has a BODY_SIZE_LIMIT bypass in @sveltejs/adapter-node

Updated under an hour ago (Oct 26, 2026, 2:50 PM ET)

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It affects sveltejs kit and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

sveltejs kit sveltejs:kit (from the name)	before 2.57.1	CNA record
svelte kit svelte:kit	before 2.57.1	NVD

References

References

https://github.com/sveltejs/kit/security/advisories/GHSA-2crg-3p73-43xp	x-refsource-confirm, vendor-advisory
https://github.com/sveltejs/kit/commit/3202ed6c98f9e8d86bf0c4c7ad0f2e273e5e3b95	x-refsource-misc, patch
https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.57.1	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.