Next.js: Denial of Service in App Router using Server Actions

影響: npm:next >= 13.0.0, <= 15.5.27 → 15.5.28, npm:next >= 16.0.0, <= 16.4.0 → 16.4.1

Crafted requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further requests in the same process. Workarounds No workaround exists besides upgrading. Applications using Pages Router or not using Server Actions are not vulnerable.

GitHub Advisory Databaseで読む

2026/10/23 00:50、GitHub Advisory Databaseが「Next.js: Denial of Service in App Router using Server Actions」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、Next.js。CVE: CVE-2026-94482。