CVE-2025-66456

Katalog CVE

CVSS 9.8 · Critical EPSS 0,56%

Kerentanan Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') pada elysiajs elysia. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

Elysia is a Typescript framework for request validation, type inference, OpenAPI documentation and client-server communication. Versions 1.4.0 through 1.4.16 contain a prototype pollution vulnerability in `mergeDeep` after merging results of two standard schema validations with the same key. Due to the ordering of merging, there must be an any type that is set as a standalone guard, to allow for the `__proto__ prop` to be merged. When combined with GHSA-8vch-m3f4-q8jf this allows for a full RCE by an attacker. This issue is fixed in version 1.4.17. To workaround, remove the `__proto__ key` from body.

Rincian

Terbit di NVD

9 Desember 2025

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

EPSS (30 hari)

0,56% peluang dieksploitasi; lebih tinggi dari 45,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/elysiajs/elysia/security/advisories/GHSA-hxj9-33pp-j2cc exploit · patch · advisory vendor
• https://github.com/elysiajs/elysia/commit/26935bf76ebc43b4a43d48b173fc853de43bb51e patch
• https://github.com/elysiajs/elysia/commit/3af978663e437dccc6c1a2a3aff4b74e1574849e patch
• https://github.com/elysiajs/elysia/pull/1564 issue tracking · patch
• https://github.com/elysiajs/elysia/security/advisories/GHSA-8vch-m3f4-q8jf not applicable