CVE-2026-82257 MEDIUM

CVE-2026-82257: SvelteKit before 2.69.1 Prototype Pollution via File Input

Vendor Sveltejs
Product kit
Weakness CWE-1321
Published August 28, 2026
Last update August 28, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

SvelteKit versions before 2.69.1 contain a prototype pollution vulnerability in remote form functions with file input fields that accept arbitrary user-controlled path names. Attackers can manipulate the deletion path to remove methods on the prototype, potentially disabling application functionality.

Key dates

02Disclosure timeline

August 28, 2026 CVE published
August 28, 2026 Record updated