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...

GHSA-38F7-945M-QR2G Effect `AsyncLocalStorage` context lost/contaminated inside Effect fibers under concurrent load with RPC

Versions - effect: 3.19.15 - @effect/rpc: 0.72.1 - @effect/platform: 0.94.2 - Node.js: v22.20.0 - Vercel runtime with Fluid compute - Next.js: 16 App Router - @clerk/nextjs: 6.x Root cause Effect's MixedScheduler batches fiber continuations and drains them inside a single microtask or timer...

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-2026-32887: Concurrent Execution using Shared Resource with Improper Synchronization

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...

nodejs: Nodejs denial of service

A stack overflow flaw has been discovered in Node.js error handling where "Maximum call stack size exceeded" errors become uncatchable when asynchooks.createHook is enabled. Instead of reaching process.on'uncaughtException', the process terminates, making the crash unrecoverable. Applications tha...

nodejs: Nodejs denial of service

A stack overflow flaw has been discovered in Node.js error handling where "Maximum call stack size exceeded" errors become uncatchable when asynchooks.createHook is enabled. Instead of reaching process.on'uncaughtException', the process terminates, making the crash unrecoverable. Applications tha...

ALPINE-CVE-2025-59466

We have identified a bug in Node.js error handling where "Maximum call stack size exceeded" errors become uncatchable when asynchooks.createHook is enabled. Instead of reaching process.on'uncaughtException', the process terminates, making the crash unrecoverable. Applications that rely on...

CVE-2025-59466: Uncaught Exception

We have identified a bug in Node.js error handling where "Maximum call stack size exceeded" errors become uncatchable when asynchooks.createHook is enabled. Instead of reaching process.on'uncaughtException', the process terminates, making the crash unrecoverable. Applications that rely on...

Reliance on Undefined, Unspecified, or Implementation-Defined Behavior

Overview Affected versions of this package are vulnerable to Reliance on Undefined, Unspecified, or Implementation-Defined Behavior due to a flaw in error handling when asynchooks or AsyncLocalStorage is enabled. Normally, a "Maximum call stack size exceeded" error stack overflow is catchable by...