CVE-2026-106072

Node2Shell

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A flaw in Node.js TLS hostname verification allows a certificate with only a DNS SAN to authenticate an IP endpoint when the client connects using a non-canonical IPv4 spelling, such as `0177.0.0.1`, `0x7f.0.0.1`, `2130706433` or `127.1`. `tls.checkServerIdentity()` did not classify these hosts as IP addresses, but normalized them to their canonical form and matched the result against the certificate DNS names. A certificate containing `DNS:127.0.0.1` and no `IP Address:127.0.0.1` SAN was therefore accepted, while the same certificate is correctly rejected for `127.0.0.1`. Exploitation requires a certificate with a numeric DNS SAN issued by a CA trusted by the client, and a platform resolver that accepts these spellings, such as glibc. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

CVSS 6.7 (MEDIUM)

Attention and evidence

HYPE SCORE

2.9/10

REALITY · THREAT PRIORITY

2.4/10

General review priority; not probability

Evidence confidence: Insufficient evidence

Why this priority?

Technical severity: CVSS 6.7: +2.34
Fresh EPSS: 0.62%: +0.02

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

Sources: 2 documents and public datasets.

Hype components

Headline sample (25%)

30/100

Press, 30 days (60%)

10/100

Grounded branding (15%)

100/100

HYPE TOTAL28/100

Sources and documents

FortiGuard Labs | FortiGuard Center - IR Advisories

Press · 26 Oct 2026, 07:00 · Node2Shell CVEs

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 2.9 · reality 2.4 (2026-11-02 15:14). The curve appears once the score changes.

Public exploit evidence

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 6.7; EPSS 0.6%
Attention, last 30 days: 2 distinct story titles; 2 press documents; 2 publisher domains.
Technical potential: network access, high privileges, no user interaction.
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

26 Oct 2026, 07:00

Score calculated

05 Nov 2026, 13:59

Name

Node2Shell