What is CVE-2026-48930?

CVE-2026-48930 is a critical-severity vulnerability in Nodejs Node, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-06-26.

How severe is CVE-2026-48930?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Nodejs Node

CVE-2026-48930

A flaw in Node.js TLS hostname handling can cause Embedded-nul hostnames can lead to silent authority rebinding due to c-string truncation in resolver bindings. This vulnerability affects all supported release lines: **Node.js 22**, **N…

EPSS: 0.003 (19.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Nodejs Node — versions 22.22.3, 24.16.0, 26.3.0
Nodejs Node.js — versions 22.22.3, 24.16.0, 26.3.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

support@hackerone.com (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-48930?: CVE-2026-48930 is a critical-severity vulnerability in Nodejs Node, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-06-26.
How severe is CVE-2026-48930?: Critical severity. CVSS v3 base score is 9.8 out of 10.