[CVE-2026-53516] Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, Better A…

Descripción técnica

Better Auth is an authentication and authorization library for TypeScript. Prior to 1.6.11, Better Auth's OAuth callback auto-link gate in handleOAuthUserInfo accepts implicit account linking when the OAuth provider asserts email_verified: true without requiring the local user row's emailVerified field to also be true, allowing an attacker who pre-registers a victim email through /sign-up/email to bind the victim's OAuth identity to the attacker's account. The same primitive affects one-tap, and emailAndPassword.requireEmailVerification: true does not mitigate the link-time verification change. This issue is fixed in version 1.6.11.

Puntuación CVSS

Score: 8.3/10 — Severidad: HIGH — Estado NIST: Analyzed

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

Productos afectados

Better auth — Better-auth

Debilidades (CWE)

CWE-287, CWE-345

Fuente oficial

Publicado en NIST NVD.