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TI-2026-28904 Aliases CVE-2026-40073GHSA-2crg-3p73-43xp

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

Priority LOW 36CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-770.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00545 45th percentileScored 2026-11-07
Fix Fixed kit (sveltejs): 2.57.1@sveltejs/kit (npm): 2.57.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
sveltejskitbefore 2.57.12.57.1Patch availableCNA
—@sveltejs/kit (npm)before 2.57.12.57.1Patch availableGHSA-2crg-3p73-43xp
  • kit Vendorsveltejs Affected before 2.57.1 Fixed in 2.57.1 Patch available CNA
  • @sveltejs/kit (npm) Vendor— Affected before 2.57.1 Fixed in 2.57.1 Patch available GHSA-2crg-3p73-43xp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:svelte:kit:*:*:*:*:*:node.js:*:*before 2.57.1Vulnerablesveltejs
  • cpe:2.3:a:svelte:kit:*:*:*:*:*:node.js:*:* Versions before 2.57.1 Vulnerable ·sveltejs

Remediation

  • Fix · CNA kit (sveltejs) Fixed in 2.57.1
  • Fix · GHSA-2crg-3p73-43xp @sveltejs/kit (npm) Fixed in 2.57.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-40073
  2. 2026-10-03 Alias added: GHSA-2crg-3p73-43xp
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 1

Advisory 2

Other 3

  • TI-2024-15660 Sending a GET or HEAD request with a body crashes SvelteKit CVSS 3.1HIGH 7.5
  • TI-2025-41390 SvelteKit Denial of service and possible SSRF when using prerendering CVSS 4.0HIGH 8.4
  • TI-2026-18320 SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer CVSS 4.0HIGH 8.2
  • TI-2026-28905 SvelteKit's invalidated redirect in handle hook causes Denial-of-Service CVSS 4.0MEDIUM 6.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences