CVE-2026-56850: Node.js

Medium severity, CVSS 4.4. EPSS: 0.1% chance of exploitation in the next 30 days.

A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Affected products

• Node.js Node.js: from 22.0, up to and including 22.23.1; from 24.0.0, up to and including 24.18.0; from 26.0.0, up to and including 26.5.0

Published 2026-07-30. Last modified 2026-08-25.