CVE-2026-21710

nodejs node

HIGH 7.5

At a glance

Source: NVD
EPSS: EPSS 25.44 % · percentile 98 (2026-10-28)
State: PUBLISHED
Published: 2026-03-30 19:07 UTC
Updated: 2026-07-15 01:19 UTC
Assigner: hackerone
NVD status: Analyzed

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**

Weaknesses (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling
CWE-843 — Type Confusion (Access of Resource Using Incompatible Type)

References

Scores

Version	Score	Vector	Scored by
CVSS 3.0	HIGH 7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	hackerone
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	redhat-SADP
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)
CVSS 3.0	HIGH 7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · support@hackerone.com (Secondary)

European references

ENISA EUVD · EUVD-2026-17170
GCVE · GCVE-0-2026-21710

CERT-FR advisories

CERTFR-2026-AVI-0917 — Multiples vulnérabilités dans Oracle PeopleSoft · cert.ssi.gouv.fr
CERTFR-2026-AVI-0796 — Multiples vulnérabilités dans Tenable Identity Exposure · cert.ssi.gouv.fr
CERTFR-2026-AVI-0627 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
CERTFR-2026-AVI-0436 — Multiples vulnérabilités dans Tenable Identity Exposure · cert.ssi.gouv.fr
CERTFR-2026-AVI-0406 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* ≤ 20.20.1
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* ≥ 22.0.0 ≤ 22.22.1
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* ≥ 24.0.0 ≤ 24.14.0
cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* ≥ 25.0.0 ≤ 25.8.1
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:9.4:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:9.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_eus:10.0:*:*:*:*:*:*:*

Affected products

Product	Versions
nodejs · node	affected 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.*

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD