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4.1 Medium

CVE-2026-56850 A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS)…

Description

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 and versions

Product Affected versions Fixed in
Node 26.5.0 No fix stated
Node 24.18.0 No fix stated
Node 22.23.1 No fix stated

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