CVE-2026-21710 Affecting nodejs-23-doc package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
25.04% (98th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-NODEJS23DOC-15922634
  • published7 Apr 2026
  • disclosed30 Mar 2026

Introduced: 30 Mar 2026

CVE-2026-21710  (opens in a new tab)

How to fix?

There is no fixed version for Minimos:latest nodejs-23-doc.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs-23-doc package and not the nodejs-23-doc package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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

CVSS Base Scores

version 3.1