CVE-2026-48618: A flaw in Node.js TLS hostname handling can cause Node
CVE-2026-48618 analysis covering impact, affected products, versions, remediation, and cross-checked defender guidance.
CVE-2026-48618 is a vulnerability published by NVD on 6/26/2026.
What happened
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**.
Affected products and versions
- nodejs node.js 22.22.3
- nodejs node.js 24.16.0
- nodejs node.js 26.3.0
Severity and weakness
CVSS: MEDIUM 6.5. Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Weaknesses: CWE-176.
Known exploitation
No CISA KEV entry is currently attached to the NVD record.
What defenders should do
- Identify whether the affected product and version range exists in production.
- Review vendor advisories and release notes before change windows.
- Patch, upgrade, disable the vulnerable component, or apply vendor mitigations.
- Verify the running version after deployment, not only the package inventory.