---
cve: "CVE-2026-56850"
severity: "MEDIUM"
cvss: 4.1
epss: "8%"
vendor: "nodejs"
kev: false
exploited: false
published: "2026-07-30 06:25:55"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T09:48:30+02:00"
---

# CVE-2026-56850

> 4.1 MEDIUM

## Beschreibung

A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates.

This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Hoch | good |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Referenzen

- <https://nodejs.org/en/blog/vulnerability/july-2026-security-releases>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56850) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_