Page generated: 06 Nov 2026, 03:51 UTC
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CVE-2026-105483

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 recog…

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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 7.4 (HIGH)

Attention and evidence

HYPE SCORE
1.4/10
REALITY · THREAT PRIORITY
2.6/10
General review priority; not probability

Evidence confidence: Insufficient evidence

Why this priority?
  • Technical severity: CVSS 7.4: +2.59
  • Fresh EPSS: 0.30%: +0.01

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 6 documents and public datasets.

Hype components

Headline sample (25%)
10/100
Press, 30 days (60%)
20/100
Grounded branding (15%)
0/100
HYPE TOTAL14/100

Sources and documents

Cisco Security Advisory
Technical advisory · 04 Nov 2026, 18:52 · Vulnerabilities in Node.js and Brotli Affecting Cisco Products: October 2026
Cisco Security Advisory
Technical advisory · 30 Oct 2026, 19:55 · Vulnerabilities in Node.js Affecting Cisco Products: October 2026
Cisco Security Advisory
Press · 30 Oct 2026, 19:55 · Vulnerabilities in Node.js Affecting Cisco Products: October 2026
Avisos INCIBE-CERT
Press · 29 Oct 2026, 08:53 · [Actualización 30/10/2026] Múltiples vulnerabilidades en productos de Cisco
FortiGuard Labs | FortiGuard Center - IR Advisories
Press · 26 Oct 2026, 07:00 · Node2Shell CVEs
See all 6 source documents
Una Al Día
Press · 23 Oct 2026, 08:01 · Node.js corrige fallos graves de TLS y Brotli en sus ramas 26, 24 y 22

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 1.4 · reality 2.6 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs. Published 13 days ago. Exploitation evidence usually takes weeks to show up: a low reality score can mean there is no data yet, not that the flaw is mild.

Evidence in context

Confidence in exploitation evidence
Insufficient evidence
Priority basis
Exploitation in attacks unconfirmed; CVSS 7.4; EPSS 0.3%
Attention, last 30 days
4 distinct story titles; 4 press documents; 4 publisher domains.
Technical potential
network access, no prior privileges, no user interaction, additional attack conditions.
Observed activity
No exploitation observation is recorded.
Known scale
Not quantified.
Evidence confidence basis
Insufficient evidence

Score evaluated: 2026-11-05 13:59:51.107056+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
23 Oct 2026, 08:01
Published
23 Oct 2026, 16:15
Latest press mention
30 Oct 2026, 19:55
Score calculated
05 Nov 2026, 13:59