CVE-2026-82257

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7x	Vendor Advisory
https://www.vulncheck.com/advisories/sveltekit-before-2.69.1-prototype-pollution-via-file-input	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:svelte:sveltekit:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-08-28 12:16

Updated : 2026-08-31 16:43

NVD link : CVE-2026-82257

Mitre link : CVE-2026-82257

CVE.ORG link : CVE-2026-82257

JSON object : View

Products Affected

svelte

sveltekit

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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