Medium severity4.3NVD Advisory· Published Aug 28, 2026· Updated Oct 8, 2026
CVE-2026-82257
CVE-2026-82257
Description
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.
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Affected products
2Patches
Vulnerability mechanics
References
2- github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7xnvdVendor Advisory
- www.vulncheck.com/advisories/sveltekit-before-2.69.1-prototype-pollution-via-file-inputnvdThird Party Advisory
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