CVE-2025-62381 - CVE House
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Status published High CVE-2025-62381

sveltekit-superforms Prototype Pollution in `parseFormData` function of `formData.js`

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

Affected Vendor

Affected Software

sveltekit-superforms
Vulnerable Versions:
< 2.27.4

Timeline

Official Publish: October 15th, 2025
Last Modified: October 15th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-1321

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.