GHSA-4C39-4CCG-62R3 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...

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...

GHSA-6GPP-XCG3-4W24 Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale

Impact Crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. Workarounds If you cannot upgrade immediately, enforce authorization in the page's server-side data path instead...

Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale

Impact Crafted requests targeting Next.js applications using App Router built with Turbopack and a single entry in config.i18n.locales can bypass middleware/proxy based authentication. Workarounds If you cannot upgrade immediately, enforce authorization in the page's server-side data path instead...

NPM: Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale

NPM: Next.js: Middleware / Proxy bypass in App Router applications using Turbopack and single locale vulnerability discovered by ? in WordPress Npm next versions = 16.0.0, 16.2.11...

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...

PT-2026-63556

Name of the Vulnerable Software and Affected Versions Next.js versions 13.0.0 through 15.5.20 Next.js versions 16.0.0 through 16.2.10 Description Crafted requests targeting applications using App Router with at least one Server Action can cause excessive CPU usage, which blocks the processing of...

CVE-2026-44575

A flaw was found in Next.js. App Router applications that use middleware or proxy-based authorization checks are vulnerable to unauthorized access. A remote attacker can exploit this by crafting specific .rsc and segment-prefetch URLs, which bypass the intended middleware rules. This allows acces...

Exploit for Deserialization of Untrusted Data in Facebook React

CVE-2025-55182 React2Shell Analysis Report Sections require...

CVE-2026-44581 Next.js: Cross-site scripting in App Router applications using CSP nonces

Next.js is a React framework for building full-stack web applications. From 13.4.0 to before 15.5.16 and 16.2.5, App Router applications that rely on CSP nonces can be vulnerable to stored cross-site scripting when deployed behind shared caches. In affected versions, malformed nonce values derive...

NPM: Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes

NPM: Next.js has a Middleware / Proxy bypass in App Router applications via segment-prefetch routes vulnerability discovered by ? in WordPress Npm next versions = 15.2.0, 15.5.16...

CVE-2026-23870: Imperva Customers Protected Against Critical React Server Components DoS Vulnerability

TL;DR:A newly disclosed denial-of-service vulnerability, CVE-2026-23870, impacts React Server Components and dependent frameworks, including Next.js App Router deployments. The flaw enables unauthenticated attackers to send specially crafted HTTP requests that trigger excessive CPU consumption...

GHSA-Q4GF-8MX6-V5V3 Next.js has a Denial of Service with Server Components

A vulnerability affects certain React Server Components packages for versions 19.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as CVE-2026-23869. You can read more about this advisory our this...

CVE-2026-32887

Effect is a TypeScript framework that consists of several packages that work together to help build TypeScript applications. Prior to version 3.20.0, when using RpcServer.toWebHandler or HttpApp.toWebHandlerRuntime inside a Next.js App Router route handler, any Node.js AsyncLocalStorage-dependent...

Exploit for Deserialization of Untrusted Data in Facebook React

CVE-2025-55182 RSC lab intentionally vulnerable Local Doc...

PT-2026-26681

Name of the Vulnerable Software and Affected Versions Effect versions prior to 3.20.0 @effect/rpc versions prior to 0.72.1 @effect/platform versions prior to 0.94.2 Description Effect is a TypeScript framework used for building TypeScript applications. A flaw exists in versions prior to 3.20.0,...

Exploit for Deserialization of Untrusted Data in Facebook React

CyberSec Blog CTF - React2Shell PoC Ce dépôt fournit un envir...

Exploit for Deserialization of Untrusted Data in Facebook React

React2Shell PoC This repository provides a minimal intentiona...

tRPC has possible prototype pollution in `experimental_nextAppDirCaller`

Note that this vulnerability is only present when using experimentalcaller / experimentalnextAppDirCaller. Summary A Prototype Pollution vulnerability exists in @trpc/server's formDataToObject function, which is used by the Next.js App Router adapter. An attacker can pollute Object.prototype by...