CVE-2026-82257

EUVD-2026-67583
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.
Prototype Pollution
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
4.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 27.58%
Affected Products (NVD)
VendorProductVersion
sveltesveltekit
𝑥
< 2.69.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7x
https://www.vulncheck.com/advisories/sveltekit-before-2.69.1-prototype-pollution-via-file-input