CVE-2026-105483: A flaw in Node.js TLS hostname verification allows a certificate without a matching IP address SAN to authenti

Routine

HIGH 7.4REMOTE

CVE-2026-105483 is a high-severity flaw (CVSS 7.4) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw in Node.js TLS hostname verification allows a certificate without a matching IP address SAN to authenticate a connection to an IPv4 address when the host is written with non-ASCII characters, such as fullwidth digits (`１２７.0.0.1`). `tls.checkServerIdentity()` did not recognize such hosts as IP addresses, even though they normalize and resolve to a regular IPv4 address, and matched them against the certificate DNS names and Common Name ins

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-295
Published	2026-10-23
Last modified	2026-10-23

Publisher (CNA): HackerOne

Timeline

2026-10-23 17:17 UTCPublished CVE record published
2026-10-23 19:42 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · gum · FIXED · 2.0.2-1.fc46 · FEDORA-2026-da0d6dd894 · source

sudo dnf upgrade --advisory=FEDORA-2026-da0d6dd894

Debian 12 · nodejs · NO FIX YET

Debian 13 · nodejs · NO FIX YET

Alpine 3.23 · nodejs · FIXED · nodejs-24.22.1-r0

apk add --upgrade nodejs apk info -v nodejs

Alpine 3.24 · nodejs · FIXED · nodejs-24.22.1-r0

apk add --upgrade nodejs apk info -v nodejs

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

References

← Back to latest CVEs