Node.js TLS handshake bug lets remote attacker crash the server

high severity · published 2026-11-11

A remote, unauthenticated attacker can send a crafted TLS client hello that triggers a use-after-destroy in the handshake handling and terminates the server process. This is denial of service: no code execution or data theft, but any affected Node.js TLS server can be crashed at will.

Fixed in: 26.13.1

CVE: CVE-2026-126051

Source: NVD

Am I affected?

You are affected if the installed version is older than 26.13.1. Check the version you have and update to 26.13.1 or later. The fixed version is verified against a vendor or advisory source.

Get the fix

FixLane has a reviewed fix procedure for this incident: a read-only check first, then the fix. Ask the Telegram bot, or connect an AI agent to the FixLane MCP server and call get_fix_prompt with incident id 2546 and your operating system.