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 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS

0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-25)

CWE

CWE-1321

Published

2026-08-28

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

Affected

• svelte:sveltekit

Packages (OSV)

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

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