better-auth: OAuth state can be used as a Magic Link to sign in as another user

影響: npm:better-auth >= 1.4.0-beta.18, < 1.7.7 → 1.7.7

Am I affected? You may be affected if you use better-auth from 1.4.0-beta.18 through versions before 1.7.7 with the Magic Link plugin and social or Generic OAuth sign-in. You are affected if all of these are true: - Magic Link is enabled with default storeToken: "plain", or with storeToken: "hashed" and global verification.storeIdentifier: "hashed" (including a hashed default). - At least one built-in social provider or Generic OAuth provider is enabled. - OAuth state uses account.storeStateStr…

GitHub Advisory Databaseで読む

2026/10/28 00:32、GitHub Advisory Databaseが「better-auth: OAuth state can be used as a Magic Link to sign in as another user」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「緊急」(critical) です。関連する技術: JavaScript / Node.js。CVE: CVE-2026-114607。