MEDIUM 4.1 Microsoft
CVE-2026-56850
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**.
Microsoft Security Update 2026-Jul: 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
- azl3 nodejs 24.17.0-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56850
- https://nvd.nist.gov/vuln/detail/CVE-2026-56850
This medium severity vulnerability with a CVSS score of 4.1 was published on 2026-07-14 via Microsoft. Affected: azl3 nodejs 24.17.0-1 on Azure Linux 3.0.
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