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CVE-2026-21636

Quick assessment

Affected
nodejs node
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Node.js是Node.js开源的一个开源、跨平台的 JavaScript 运行时环境。 Node.js v25版本存在安全漏洞，该漏洞源于权限模型存在缺陷，允许Unix域套接字连接绕过网络限制，可能导致访问特权本地服务，引发权限提升、数据泄露或本地代码执行。

AI Predicted 8.1 Difficulty: Easy EPSS 0.88% · P58
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I. Basic Information for CVE-2026-21636

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when `--permission` is enabled. Even without `--allow-net`, attacker-controlled inputs (such as URLs or socketPath options) can connect to arbitrary local sockets via net, tls, or undici/fetch. This breaks the intended security boundary of the permission model and enables access to privileged local services, potentially leading to privilege escalation, data exposure, or local code execution. * The issue affects users of the Node.js permission model on version v25. In the moment of this vulnerability, network permissions (`--allow-net`) are still in the experimental phase.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Node.js 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Node.js是Node.js开源的一个开源、跨平台的 JavaScript 运行时环境。 Node.js v25版本存在安全漏洞，该漏洞源于权限模型存在缺陷，允许Unix域套接字连接绕过网络限制，可能导致访问特权本地服务，引发权限提升、数据泄露或本地代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nodejs node 25.2.1 ~ 25.2.1 -

II. Public POCs for CVE-2026-21636

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III. Intelligence Information for CVE-2026-21636

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Security Blog Posts for CVE-2026-21636 (1)

Same Patch Batch · nodejs · 2026-01-20 · 8 CVEs total

CVE-2026-21637 Node.js 安全漏洞
CVE-2025-59465 Node.js 安全漏洞
CVE-2025-59464 Node.js 安全漏洞
CVE-2025-59466 Node.js 安全漏洞
CVE-2025-55132 Node.js 安全漏洞
CVE-2025-55130 Node.js 安全漏洞
CVE-2025-55131 Node.js 安全漏洞

IV. Related Vulnerabilities

Same product: node
Same vendor: nodejs

V. Comments for CVE-2026-21636

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