CVE-2026-82257

MEDIUM 4.3

SvelteKit before 2.69.1 Prototype Pollution via File Input

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-1321
Vendor	sveltejs
Product	kit
Published	Aug 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

sveltejs / kit

0 < 2.69.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

🔍 iaohkut-from-NightWolf-Team dummdidumm