CVE-2026-105483 Node.js - Authentication Bypass

Node.js 24.x and 26.x contain a broken authentication caused by improper TLS hostname verification allowing certificates with non-matching IP SANs to authenticate IPv4 addresses with non-ASCII characters, letting attackers impersonate IP endpoints, exploit requires crafted certificate and hostname.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
Proof of concept available
EPSS
0.24% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Man In The Middle
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
23 October 2026
Updated
25 October 2026
Weakness
CWE-295

Vendor fix

Update to the latest Node.js 24.x or 26.x versions with the fix applied.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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