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 applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further...

CVE-2026-64641

Next.js CVE-2026-64641 describes a denial-of-service in App Router when using at least one Server Action. Affected versions are 13.0.0–15.5.20 and 16.0.0–16.2.10; crafted requests can cause excessive CPU usage that blocks processing of further requests within the same process. The issue is fixed ...

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 applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further...

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 applications using App Router with at least one Server Action can lead to excessive CPU usage blocking processing of further...

CVE-2026-64643: Insertion of Sensitive Information Into Sent Data

Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, Next.js applications using App Router, Server Actions use server or use cache endpoints can be disclosed bypassing any authentication on the pages where these...

Next.js Framework 14.1.1 < 15.5.21 / 16.x < 16.2.11 SSRF

The Next.js Framework on the remote host is affected by a server-side request forgery vulnerability: - When a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host Server-Side Request Forgery. This requires the attacker's...

Denial Of Service

Next.js is vulnerable to Denial Of Service. The vulnerability is due to improper handling of crafted requests targeting applications using the App Router with Server Actions, allowing attackers to trigger excessive CPU usage and block processing of further requests...

Denial Of Service (DoS)

Next.js is vulnerable to Denial Of Service DoS. The vulnerability is due to improper handling of requests targeting App Router applications with Server Actions running on the Edge runtime, allowing attackers to trigger excessive memory consumption and degrade application availability...

NPM: Next.js: Server-Side Request Forgery in Server Actions on custom servers

NPM: Next.js: Server-Side Request Forgery in Server Actions on custom servers vulnerability discovered by ? in WordPress Npm next versions = 14.1.1, 15.5.21...

Next.js: Server-Side Request Forgery in Server Actions on custom servers

Impact When a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host Server-Side Request Forgery. This requires the attacker's request to control Host-associated headers. In some configurations, it's also possible to obtai...

GHSA-89XV-2M56-2M9X Next.js: Server-Side Request Forgery in Server Actions on custom servers

Impact When a Server Action forwards or redirects a request, an attacker can cause the server to send that outbound request to a malicious host Server-Side Request Forgery. This requires the attacker's request to control Host-associated headers. In some configurations, it's also possible to obtai...

Allocation of Resources Without Limits or Throttling

Overview next is a react framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the handleAction Server Actions path in the App Router Edge runtime. An attacker can exhaust server memory by sending an oversized Server Action request...

Next.js: Unbounded Server Action payload in Edge runtime

Impact Requests targeting Next.js applications using App Router with at least one Server Action can lead to excessive memory consumption if that Server Actions uses the Edge runtime Workarounds If you cannot upgrade, ensure your hosting provider limits the request's body size. 5 MiB should be...

GHSA-955P-X3MX-JCVP Next.js: Unauthenticated disclosure of internal Server Function endpoints

Impact In Next.js applications using App Router, Server Actions use server or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts for...

Next.js: Unauthenticated disclosure of internal Server Function endpoints

Impact In Next.js applications using App Router, Server Actions use server or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts for...

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

NPM: Next.js: Denial of Service in App Router using Server Actions vulnerability discovered by ? in WordPress Npm next versions = 13.0.0, 15.5.21...

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

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...

Allocation of Resources Without Limits or Throttling

Overview next is a react framework. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the areAllActionIdsValid validation in server action form submission handling. An attacker can exhaust CPU and block other requests in the same...

GHSA-M99W-X7HQ-7VFJ Next.js: Denial of Service in App Router using Server Actions

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...

PT-2026-63558

Name of the Vulnerable Software and Affected Versions Next.js versions 12.0.0 through 15.5.20 Next.js versions 16.0.0 through 16.2.10 Description Applications using App Router, Server Actions use server, or use cache endpoints may disclose these endpoints, bypassing authentication on the pages...