CVE-2026-56850

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**.

CVSS Vector

References

• https://nodejs.org/en/blog/vulnerability/july-2026-security-releases