---
id: CVE-2025-62381
title: sveltekit-superforms makes SvelteKit forms a pleasure to use
summary: >-
  sveltekit-superforms makes SvelteKit forms a pleasure to use.
  sveltekit-superforms v2.27.3 and prior are susceptible to a prototype
  pollution vulnerability within the parseFormData function of formData.js. An
  attacker can inject string a…
severity: none
cwe:
  - CWE-1321
published: '2025-10-15'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-62381'
references:
  - url: >-
      https://github.com/ciscoheat/sveltekit-superforms/commit/4a1310dd1a94176bb22036662c530dad48059ca4
    label: security-advisories@github.com
  - url: >-
      https://github.com/ciscoheat/sveltekit-superforms/security/advisories/GHSA-hwmc-4c8j-xxj7
    label: security-advisories@github.com
  - url: >-
      https://github.com/ciscoheat/sveltekit-superforms/security/advisories/GHSA-hwmc-4c8j-xxj7
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00553
epssPercentile: 0.44465
ingestedAt: '2026-10-08T11:31:27.443Z'
---

## Overview

sveltekit-superforms makes SvelteKit forms a pleasure to use. sveltekit-superforms v2.27.3 and prior are susceptible to a prototype pollution vulnerability within the parseFormData function of formData.js. An attacker can inject string and array properties into Object.prototype, leading to denial of service, type confusion, and potential remote code execution in downstream applications that rely on polluted objects. This vulnerability is fixed in 2.27.4.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.