CVE-2026-64641 — Next.js: Denial of Service in App Router using Server Actions
Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, crafted requests targeting Next.js applicat…
Published: 2026-07-27 · CVSS: 8.2 · CVSS 4.0
Next.js is a React framework for building full-stack web applications. In versions 13.0.0 through 15.5.20 and 16.0.0 through 16.2.10, 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. This issue has been fixed in versions 15.5.21 and 16.2.11.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7