CVE-2026-21711_CVE-2026-21711

5.3 / 10

MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Description

A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.

As a result, code running under `--permission` without `--allow-net` can create and expose local IPC endpoints, allowing communication with other processes on the same host outside of the intended network restriction boundary.

This vulnerability affects Node.js **25.x** processes using the Permission Model where `--allow-net` is intentionally omitted to restrict network access. Note that `--allow-net` is currently an experimental feature.

Basic Information

ID CVE-2026-21711

Source hackerone

Published Mar 30, 2026 at 19:07

Modified Apr 1, 2026 at 15:03

Affected Product

Vendor nodejs

Product node

Version 25.8.1

Affected Versions nodejs node 25.8.1
nodejs node 4.0
nodejs node 5.0
nodejs node 6.0
nodejs node 7.0
nodejs node 8.0
nodejs node 9.0
nodejs node 10.0
nodejs node 11.0
nodejs node 12.0
nodejs node 13.0
nodejs node 14.0
nodejs node 15.0
nodejs node 16.0
nodejs node 17.0
nodejs node 18.0
nodejs node 19.0

CWE Classification

CWE-284

References

nodejs.org /en/blog/vulnerability/march-2026-security-releases

{
    "lastseen": "",
    "description": "A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.\r\n\r\nAs a result, code running under `--permission` without `--allow-net` can create and expose local IPC endpoints, allowing communication with other processes on the same host outside of the intended network restriction boundary.\r\n\r\nThis vulnerability affects Node.js **25.x** processes using the Permission Model where `--allow-net` is intentionally omitted to restrict network access. Note that `--allow-net` is currently an experimental feature.",
    "published": "2026-03-30T19:07:28.526Z",
    "modified": "2026-04-01T15:03:21.612Z",
    "type": "cve",
    "title": "CVE-2026-21711",
    "source": "hackerone",
    "references": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases",
    "id": "CVE-2026-21711",
    "bulletinFamily": "",
    "cwe": [
        "CWE-284"
    ],
    "cvelist": null,
    "sourceData": "nodejs node 25.8.1\nnodejs node 4.0\nnodejs node 5.0\nnodejs node 6.0\nnodejs node 7.0\nnodejs node 8.0\nnodejs node 9.0\nnodejs node 10.0\nnodejs node 11.0\nnodejs node 12.0\nnodejs node 13.0\nnodejs node 14.0\nnodejs node 15.0\nnodejs node 16.0\nnodejs node 17.0\nnodejs node 18.0\nnodejs node 19.0",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
        "version": "3.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "node",
    "version": "25.8.1",
    "vendor": "nodejs",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}