{"id":"GHSA-866w-xmhq-wj7x","summary":"SvelteKit: Prototype pollution in file input deletion path in remote-function forms","details":"If you use remote form functions, have an input field of type `file`, and accept arbitrary user-controlled path names for the field, then you are vulnerable to a prototype pollution attack where the attacker can remove e.g. methods on the prototype.","aliases":["CVE-2026-82257"],"modified":"2026-08-29T03:55:36.205388747Z","published":"2026-07-24T15:58:05Z","database_specific":{"github_reviewed_at":"2026-07-24T15:58:05Z","nvd_published_at":null,"cwe_ids":["CWE-1321"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7x"},{"type":"WEB","url":"https://github.com/sveltejs/kit/pull/16218"},{"type":"WEB","url":"https://github.com/sveltejs/kit/commit/df32f6fe86cdd0b68b650e3e4631e5896453dcd3"},{"type":"PACKAGE","url":"https://github.com/sveltejs/kit"},{"type":"WEB","url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.69.1"},{"type":"WEB","url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@3.0.0-next.7"}],"affected":[{"package":{"name":"@sveltejs/kit","ecosystem":"npm","purl":"pkg:npm/%40sveltejs/kit"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.69.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 2.69.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-866w-xmhq-wj7x/GHSA-866w-xmhq-wj7x.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"}]}