---
cve: "CVE-2026-1528"
severity: "HIGH"
cvss: 7.5
epss: "0.5%"
vendor: "undici"
kev: false
exploited: false
published: "2026-03-12 21:16:25"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:07:10+02:00"
---

# CVE-2026-1528

> 7.5 HIGH · 🧪 PoC

## Beschreibung

ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process.

Patches

Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

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

## Patch verfügbar (OSV)

- 8873c947271faf1ebc455bdc6158ecbc022ecfa9 (Commit)
- 07a39067a0485c1953196f500d945fe09378a176 (Commit)

## Referenzen

- <https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj>
- <https://hackerone.com/reports/3537648>
- <https://cna.openjsf.org/security-advisories.html>
- <https://access.redhat.com/errata/RHSA-2026:13826>
- <https://access.redhat.com/errata/RHSA-2026:17789>
- <https://access.redhat.com/errata/RHSA-2026:21772>
- <https://access.redhat.com/errata/RHSA-2026:21931>
- <https://access.redhat.com/errata/RHSA-2026:34342>
- <https://access.redhat.com/errata/RHSA-2026:5807>
- <https://access.redhat.com/errata/RHSA-2026:7080>
- <https://access.redhat.com/errata/RHSA-2026:7123>
- <https://access.redhat.com/errata/RHSA-2026:7302>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-1528) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_