GHSA-m99w-x7hq-7vfjHigh

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

Published
July 22, 2026
Last Modified
July 22, 2026

🔗 CVE IDs covered (1)

CVE-2026-64641 →

📋 Description

Impact

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.

🎯 Affected products2

  • npm/next:>= 13.0.0, < 15.5.21
  • npm/next:>= 16.0.0, < 16.2.11

🔗 References (6)