Description
A flaw in Node.js TLS hostname handling can cause Node.js unicode dot separator handling can lead to tls wildcard-depth authentication bypass due to resolver and verifier hostname normalization mismat.

This can lead to confidentiality impact or bypass of the intended security boundary under affected configurations.

This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
Published: 2026-06-26
Score: 7.7 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 27 Jun 2026 00:15:00 +0000

Type Values Removed Values Added
Title Node.js TLS Wildcard Verification Bypass via Unicode Dot Separator nodejs: Node.js: Authentication bypass due to TLS hostname handling and unicode dot separator mismatch
First Time appeared Redhat
Redhat hummingbird
Weaknesses CWE-289
CPEs cpe:/a:redhat:hummingbird:1
Vendors & Products Redhat
Redhat hummingbird
References
Metrics threat_severity

None

threat_severity

Important


Fri, 26 Jun 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 26 Jun 2026 07:30:00 +0000

Type Values Removed Values Added
First Time appeared Nodejs
Nodejs nodejs
Vendors & Products Nodejs
Nodejs nodejs

Fri, 26 Jun 2026 03:45:00 +0000

Type Values Removed Values Added
Title Node.js TLS Wildcard Verification Bypass via Unicode Dot Separator

Fri, 26 Jun 2026 01:30:00 +0000

Type Values Removed Values Added
Description A flaw in Node.js TLS hostname handling can cause Node.js unicode dot separator handling can lead to tls wildcard-depth authentication bypass due to resolver and verifier hostname normalization mismat. This can lead to confidentiality impact or bypass of the intended security boundary under affected configurations. This vulnerability affects all supported release lines: **Node.js 22**, **Node.js 24**, and **Node.js 26**.
Weaknesses CWE-176
References
Metrics cvssV3_0

{'score': 7.7, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-06-26T15:10:40.049Z

Reserved: 2026-05-22T15:00:09.276Z

Link: CVE-2026-48618

cve-icon Vulnrichment

Updated: 2026-06-26T15:10:33.683Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Important

Publid Date: 2026-06-26T01:14:36Z

Links: CVE-2026-48618 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-06-27T03:00:12Z

Weaknesses