CVE-2026-21636

EIP tracks 1 public exploit for CVE-2026-21636. PoCs published by Pauldechassey.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2026-21636, demonstrating a bypass in Node.js's permission model that allows network access via Unix Domain Sockets and local TCP addresses despite the absence of the --allow-net flag. The exploit leverages dynamic import injection and the V8 inspector to achieve arbitrary code execution in an unsandboxed process.

A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when `--permission` is enabled. Even without `--allow-net`, attacker-controlled inputs (such as URLs or socketPath options) can connect to arbitrary local sockets via net, tls, or undici/fetch. This breaks the intended security boundary of the permission model and enables access to privileged local services, potentially leading to privilege escalation, data exposure, or local code execution. * The issue affects users of the Node.js permission model on version v25. In the moment of this vulnerability, network permissions (`--allow-net`) are still in the experimental phase.