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...

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

Impact App Router applications that rely on middleware or proxy-based checks for authorization can allow unauthorized access through transport-specific route variants used for segment prefetching. In affected configurations, specially crafted .rsc and segment-prefetch URLs can resolve to the same...

GHSA-8H8Q-6873-Q5FJ Next.js Vulnerable to 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-2026-23870. A specially crafted HTTP request can be sent to any...

Next.js Vulnerable to 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-2026-23870. A specially crafted HTTP request can be sent to any...

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...

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...

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...

CVE-2026-32887 Effect Bug: `AsyncLocalStorage` context lost/contaminated inside Effect fibers under concurrent load with RPC

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...

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...

CVE-2026-32887

The Connected document details a concurrency vulnerability in the Effect ecosystem where AsyncLocalStorage (ALS) context is not properly propagated across fibers in a web handler under concurrent load. Root cause: a scheduler drains multiple fiber continuations in a single drain cycle, causing AL...

CVE-2026-32887 Effect Bug: `AsyncLocalStorage` context lost/contaminated inside Effect fibers under concurrent load with RPC

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...

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,...

CVE-2026-27979

A denial of service flaw has been discovered in Next.js. A request containing the next-resume: 1 header corresponding with a PPR resume request would buffer request bodies without consistently enforcing maxPostponedStateSize in certain setups. The previous mitigation protected minimal-mode...

CVE-2026-27979

Next.js is a React framework for building full-stack web applications. Starting in version 16.0.1 and prior to version 16.1.7, a request containing the next-resume: 1 header corresponding with a PPR resume request would buffer request bodies without consistently enforcing maxPostponedStateSize in...

CVE-2026-27979

Next.js CVE-2026-27979 affects Next.js 16.0.1 through 16.1.6 in non-minimal deployments with Partial Prerendering enabled. A request containing the next-resume: 1 header can cause unbounded postponed-body buffering, consuming memory and enabling DoS. The issue is fixed in 16.1.7 by enforcing size...

CVE-2026-27979 Next.js: Unbounded postponed resume buffering can lead to DoS

Next.js is a React framework for building full-stack web applications. Starting in version 16.0.1 and prior to version 16.1.7, a request containing the next-resume: 1 header corresponding with a PPR resume request would buffer request bodies without consistently enforcing maxPostponedStateSize in...

CVE-2026-27979 Next.js: Unbounded postponed resume buffering can lead to DoS

Next.js is a React framework for building full-stack web applications. Starting in version 16.0.1 and prior to version 16.1.7, a request containing the next-resume: 1 header corresponding with a PPR resume request would buffer request bodies without consistently enforcing maxPostponedStateSize in...