Preliminary research

Unicode-dot normalization bypasses Node.js TLS wildcard depth checks

AI-collected research leads through 6 October 2026, including bounded month-by-month reviews of selected social and community sources from January through September. Unranked, incomplete, not community-vetted, and subject to change.

Normalizes Unicode dot separators before wildcard hostname validation and supplies a regression test for resolver/verifier disagreement. The change prevents a certificate wildcard from matching an apparent single label that becomes multiple DNS labels when the hostname is normalized for connection establishment.

Record

Published by

Node.js project

In the archive

• Collected in the 2026 preliminary research sweep

Related sources

• Fix and regression test

Tags

• nodejs
• tls
• unicode
• parser-differential
• mitigation
• owasp-a02-2021

This page is the archive's own catalogue record. The research is the work of Node.js project, first published at the original source. Preserved copies are kept so the citation survives its host.