better-auth: OAuth Proxy lets an attacker sign in as another user

影響: npm:better-auth >= 1.5.0-beta.12, < 1.7.7 → 1.7.7

Am I affected? You may be affected if you use better-auth from 1.5.0-beta.12 through versions before 1.7.7 with the OAuth Proxy plugin. You are affected only if all of these are also true: - On a participating environment, the OAuth Proxy plugin has no dedicated secret, or its secret equals that environment's global Better Auth secret. - Sign-in state is stored in a cookie (account.storeStateStrategy: "cookie"). With a database or secondary storage, this is only the case if you chose it explici…

GitHub Advisory Databaseで読む

2026/10/28 00:32、GitHub Advisory Databaseが「better-auth: OAuth Proxy lets an attacker 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「重要」(high) です。関連する技術: JavaScript / Node.js。