GHSA-wqjv-9729-c5q2: SvelteKit Big Remote Form Function Payloads Vulnerability

MODERATE
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CVSS 5.3
CWE-248
Published
Advisory Summary

GHSA-wqjv-9729-c5q2 is a MODERATE (CVSS 5.3) big remote form function payloads vulnerability (CWE-248: Uncaught Exception) affecting SvelteKit libraries in the npm ecosystem. The issue involves big remote form function payloads can cause node process to crash. Remediation is available by upgrading affected packages to version 2.69.1.

GHSA-wqjv-9729-c5q2 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-wqjv-9729-c5q2
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-248: Uncaught Exception
Affected Product SvelteKit
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix GHSA-wqjv-9729-c5q2

To remediate this vulnerability, upgrade all affected SvelteKit dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

@sveltejs/kit fixed: 2.69.1 
npm install @sveltejs/kit@2.69.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls @sveltejs/kit

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-wqjv-9729-c5q2, inspect your project dependencies using npm:

npm ls @sveltejs/kit

Analyze the terminal output to locate any version of SvelteKit in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.69.1), your application is affected.

Note: The npm ls @sveltejs/kit command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-248: Uncaught Exception, where an exception is thrown from a function, but it is not caught. In SvelteKit, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Big remote form function payloads can cause the Node process to crash. Doing this repeatedly can cause DoS.

GHSA-wqjv-9729-c5q2 Affected SvelteKit Versions

1 component(s)
Fixed Versions:
2.69.1
Product / Package Ecosystem Affected Versions Fixed Version
@sveltejs/kit
npm/@sveltejs/kit
npm
< 2.69.1
2.69.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sveltejs/kit/security/advisories/GHSA-wqjv-9729-c5q2
SvelteKit Source Repository REPOSITORY
https://github.com/sveltejs/kit/pull/16219
Security Fix Commit FIX COMMIT
https://github.com/sveltejs/kit/commit/82b0370c793ac392cee5c2e28f4b8fed09c64582
SvelteKit Source Repository REPOSITORY
https://github.com/sveltejs/kit
SvelteKit Release RELEASE
https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.69.1
SvelteKit Release RELEASE
https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.0.0-next.7

Frequently Asked Questions

What is GHSA-wqjv-9729-c5q2?
GHSA-wqjv-9729-c5q2 is a security vulnerability in SvelteKit involving Big remote form function payloads can cause Node process to crash under CWE-248: Uncaught Exception.
Which SvelteKit versions are affected?
Affected versions include releases prior to 2.69.1 across affected packages: @sveltejs/kit.
What version fixes GHSA-wqjv-9729-c5q2?
Upgrading to 2.69.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @sveltejs/kit affected?
Yes, @sveltejs/kit is affected in releases prior to 2.69.1. Upgrade your dependency to 2.69.1 or later.
What is the CVSS score of GHSA-wqjv-9729-c5q2?
GHSA-wqjv-9729-c5q2 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with GHSA-wqjv-9729-c5q2?
GHSA-wqjv-9729-c5q2 is classified under CWE-248: Uncaught Exception (An exception is thrown from a function, but it is not caught.).
How can I check npm dependencies for GHSA-wqjv-9729-c5q2?
Run the dependency tree command: 'npm ls @sveltejs/kit'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wqjv-9729-c5q2",
  "modified" : "2026-07-24T15:50:40Z",
  "published" : "2026-07-24T15:50:40Z",
  "aliases" : [ ],
  "summary" : "SvelteKit: Big remote form function payloads can cause Node process to crash",
  "details" : "Big remote form function payloads can cause the Node process to crash. Doing this repeatedly can cause DoS.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@sveltejs/kit"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.69.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.69.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/kit/security/advisories/GHSA-wqjv-9729-c5q2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/kit/pull/16219"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/kit/commit/82b0370c793ac392cee5c2e28f4b8fed09c64582"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/sveltejs/kit"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.69.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.0.0-next.7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-248" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-24T15:50:40Z",
    "nvd_published_at" : null
  }
}