CVE-2025-62381CWE-1321

CVE-2025-62381

published October 15, 2025

CVSS
8.3
EPSS
1%
Percentile
53.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.3 · NONE
CVSS v4.0
Not supplied
EPSS
0.00732 · 53.9th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2025-10-15T22:15Z
References (3)
https://github.com/ciscoheat/sveltekit-superforms/commit/4a1310dd1a94176bb22036662c530dad48059ca4 · [email protected]https://github.com/ciscoheat/sveltekit-superforms/security/advisories/GHSA-hwmc-4c8j-xxj7 · [email protected]https://github.com/ciscoheat/sveltekit-superforms/security/advisories/GHSA-hwmc-4c8j-xxj7 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 OCT 17:12Z
    sveltekit-superforms Prototype Pollution in `parseFormData` function of `formData.js`
    cvelistv5