Input validation error in Node.js - CVE-2026-48618
Published: June 22, 2026
Vulnerability identifier: #VU135015
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-48618
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Node.js Foundation
Affected software:
Node.js
Node.js
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass tls wildcard-depth authentication.
The vulnerability exists due to improper input validation in TLS hostname handling when normalizing hostnames with unicode dot separators. A remote attacker can present a crafted hostname to bypass tls wildcard-depth authentication.
This can lead to confidentiality impact or bypass of the intended security boundary under affected configurations.
How to mitigate CVE-2026-48618
Install security update from vendor's website.