Executive Summary

This vulnerability is a flaw in Node.js's TLS hostname handling related to how it processes unicode dot separators. Specifically, the way Node.js normalizes hostnames in the resolver and verifier can cause a mismatch, which allows a bypass of TLS wildcard-depth authentication.

In simpler terms, the system that checks if a server's TLS certificate matches the hostname can be tricked due to improper handling of certain unicode characters, potentially allowing unauthorized access.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can lead to a confidentiality impact by allowing an attacker to bypass the intended security boundaries of TLS authentication.

As a result, an attacker might be able to impersonate a trusted server or intercept sensitive communications that are supposed to be protected by TLS, potentially exposing confidential information.

Useful 0 Not Useful 0

Compliance Impact

The vulnerability in Node.js TLS hostname handling can lead to confidentiality impact or bypass of the intended security boundary under affected configurations.

Such confidentiality impacts could potentially affect compliance with standards and regulations like GDPR and HIPAA, which require protection of sensitive data and secure authentication mechanisms.

However, there is no explicit information provided about direct effects on compliance with these standards.

Useful 0 Not Useful 0

Mitigation Strategies

To mitigate this vulnerability, users should update Node.js to the latest patched versions in the supported release lines: Node.js 22, Node.js 24, and Node.js 26.

Useful 0 Not Useful 0