7.4

CVE-2026-105483: nodejs node Improper Certificate Validation

Awaiting analysis
AliasesDEBIAN-CVE-2026-105483UBUNTU-CVE-2026-105483ALPINE-CVE-2026-105483
Published 23-10-2026Last modified 23-10-2026

Vulnerability summary

CVE-2026-105483 is a high (CVSS 7.4) Improper Certificate Validation vulnerability in nodejs node. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.9% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.4 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 28-10-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.4/10
010
High · v3.0 (CVE.org)
EPSS score
0.27%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:12248-1

Timeline

  1. 23-10-2026
    PublishedVulnerability first disclosed.

Description

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 instead. A certificate containing `DNS:127.0.0.1` or `DNS:*.0.0.1` could therefore be accepted for an IP endpoint it was not issued for. This is a regression introduced after the fix for CVE-2026-48618. This vulnerability affects Node.js **26.x** and **24.x**.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

20%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

24-10-202628-10-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard2 products
  • nodejs-24< 24.22.1-r0
  • nodejs-26< 26.12.1-r0
Wolfi2 products
  • nodejs-24< 24.22.1-r0
  • nodejs-26< 26.12.1-r0
Alpine1 product
  • nodejs< 24.22.1-r0
Debian1 product
  • nodejsAll versions (No fix recorded)
Nodejs1 product
  • node24.22.0 | 26.12.0
Ubuntu1 product
  • nodejsAll versions (No fix recorded)

6 vendors · 8 products

References

6 links