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CVE-2026-21636VulnerabilityPublished

CVE-2026-21636: nodejs node · Vulnerability

Affects nodejs nodeSource CVE Database V5

0

Not known to be exploited · CVSS 5.8 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.0 base score
5.8Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.8% chance of exploitation in 30 days – higher than 58% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 20 Jan 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

What to do

Affected software

ProductAffectedFixed in
nodejsnodeAffected
  • >=25.2.1 <=25.2.1
Fixed in–
npmnodepkg:npm/nodeOther threatsAffected
  • =25.2.1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, avoid enabling the --permission flag in environments where untrusted inputs can influence socket connections or restrict usage of affected Node.js version 25.2.1.

Description

Node.js version 25.2.1 contains a vulnerability in its permission model that allows Unix Domain Socket (UDS) connections to bypass network restrictions when the --permission flag is enabled. This flaw permits attacker-controlled inputs to connect to arbitrary local sockets even without the --allow-net permission, breaking the intended security boundary. The issue can lead to unauthorized access to privileged local services, potentially resulting in privilege escalation or data exposure. The network permissions feature was still experimental at the time of this vulnerability.

References

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