Node.js 24.x < 24.22.1 / 26.x < 26.12.1 TLS Certificate Hostname Bypass

The version of Node.js installed on the remote host is 24.x prior to 24.22.1 or 26.x prior to 26.12.1. It is, therefore, affected by a TLS certificate hostname bypass vulnerability as referenced in the Wednesday, October 21, 2026 Security Releases advisory. - TLS certificate hostname verification...

Node.js: TLS certificate hostname bypass when the IP is written fullwidth digits

A flaw was discovered in TLS hostname verification that allowed a certificate without a matching IP address to authenticate connections when the host was written using non-ASCII characters. The verification function failed to recognize such hosts as IP addresses and instead matched them against...