Bug 2559954

Summary: CVE-2026-105483 nodejs24: nodejs: TLS certificate hostname bypass via fullwidth-digit IP hostnames [fedora-rawhide]
Product: [Fedora] Fedora Reporter: Srikanth Balasubramanian <sbalasub>
Component: nodejs24Assignee: Jan Staněk <jstanek>
Status: CLOSED RAWHIDE QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: rawhideCC: aradchen, jstanek, tjuhasz
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b6480eae-54a1-4bc0-9868-c5a88c627b9d"]}
Fixed In Version: nodejs24-24.22.1 Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-11-03 11:26:40 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2559870    

Description Srikanth Balasubramanian 2026-10-23 15:40:38 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

A flaw was found in Node.js. A regression in TLS IP hostname normalization allows a host written with fullwidth Unicode digits to bypass certificate hostname verification in checkServerIdentity. A TLS client can be made to accept a certificate that does not properly identify the requested IP address when connecting with such a hostname, enabling server impersonation.
Comment 1 Jan Staněk 2026-11-03 11:26:40 UTC 
This vulnerability is fixed in the latest available release of nodejs24-24.22.1.