CVE-2026-105483 remediation checklist for Node.js teams
CVE-2026-105483 remediation checklist for Node.js teams The fastest accurate response to CVE-2026-105483 starts with the runtime version and ends with evidence that the deployed client rejects the wrong certificate identity. The bug affects Node.js 24.x before 24.22.1 and 26.x before 26.12.1. During TLS verification, a fullwidth-digit IPv4 destination could be normalized and resolved as an…
The CVE-2026-105483 vulnerability affects Node.js versions 24.x before 24.22.1 and 26.x before 26.12.1. The issue arises during TLS verification when a fullwidth-digit IPv4 destination is normalized and resolved as an address, while DNS names are checked against the certificate. A trusted certificate with a matching DNS SAN can authenticate an IP endpoint without an IP SAN.
To remediate this vulnerability, Node.js teams should identify the running runtime, upgrade to the latest patched versions, review clients that accept destinations from tenants or users, narrow destination input to approved ASCII DNS names or canonical IP literals, and review trust anchors to limit client trust to required authorities.
This remediation checklist is divided into two parts: mandatory runtime fixes and application hardening and assurance work.
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