Bug 2559947

Summary: CVE-2026-106069 nodejs24: nodejs: TLS certificate hostname bypass via non-canonical IP hostnames [fedora-43]
Product: [Fedora] Fedora Reporter: Srikanth Balasubramanian <sbalasub>
Component: nodejs24Assignee: Jan Staněk <jstanek>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: 43CC: aradchen, jstanek, tjuhasz
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["4b62032e-c103-4a62-a7dc-564c38c18415"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 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: 2559873    

Description Srikanth Balasubramanian 2026-10-23 15:38:46 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. Non-canonical numeric hostnames (for example 127.1 or 0127.0.0.1) can be normalized by domainToASCII() to one IPv4 address for certificate checks while the platform resolver connects to a different address. A TLS client may therefore accept a certificate that does not identify the connected peer, enabling server impersonation.