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CVE-2026-21710

Quick assessment

Affected
nodejs node
Exploitation
High exploitation probability; assess promptly
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 20.x版本、22.x版本、24.x版本和25.x版本存在安全漏洞，该漏洞源于HTTP请求处理不当，当请求头名为__proto__且应用程序访问req.headersDistinct时，可能导致未捕获的TypeError和进程崩溃。

AI Predicted 7.5 Difficulty: Easy EPSS 25.04% · P98

Affected Version Matrix 20

VendorProduct Version RangeStatus
nodejs node 20.20.1≤ 20.20.1 affected
22.22.1≤ 22.22.1 affected
24.14.0≤ 24.14.0 affected
25.8.1≤ 25.8.1 affected
4.0< 4.* affected
5.0< 5.* affected
6.0< 6.* affected
7.0< 7.* affected
… +12 more rows
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I. Basic Information for CVE-2026-21710

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in Node.js HTTP request handling causes an uncaught `TypeError` when a request is received with a header named `__proto__` and the application accesses `req.headersDistinct`. When this occurs, `dest["__proto__"]` resolves to `Object.prototype` rather than `undefined`, causing `.push()` to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by `error` event listeners, meaning it cannot be handled without wrapping every `req.headersDistinct` access in a `try/catch`. * This vulnerability affects all Node.js HTTP servers on **20.x, 22.x, 24.x, and v25.x**
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 20.x版本、22.x版本、24.x版本和25.x版本存在安全漏洞，该漏洞源于HTTP请求处理不当，当请求头名为__proto__且应用程序访问req.headersDistinct时，可能导致未捕获的TypeError和进程崩溃。
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 20.20.1 ~ 20.20.1 -

II. Public POCs for CVE-2026-21710

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III. Intelligence Information for CVE-2026-21710

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Security Blog Posts for CVE-2026-21710 (1)

Same Patch Batch · nodejs · 2026-03-30 · 8 CVEs total

CVE-2026-21714 Node.js 安全漏洞
CVE-2026-21717 Node.js 安全漏洞
CVE-2026-21712 Node.js 安全漏洞
CVE-2026-21713 Node.js 安全漏洞
CVE-2026-21716 Node.js 安全漏洞
CVE-2026-21715 Node.js 安全漏洞
CVE-2026-21711 Node.js 安全漏洞

IV. Related Vulnerabilities

Same product: node
Same vendor: nodejs

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