---
cve: "CVE-2026-83599"
severity: "HIGH"
cvss: 7.5
epss: "20.7%"
vendor: "netdata"
kev: false
exploited: false
published: "2026-09-22 17:17:25"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T12:33:42+02:00"
---

# CVE-2026-83599

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Netdata is an open source observability tool. Prior to 2.11.0, Netdata's unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocket_client_decompress_message() to grow decompressed output toward WS_MAX_DECOMPRESSED_SIZE without enforcing a compressed-to-decompressed ratio. Small highly compressed frames can therefore cause large server-side allocations, and repeated concurrent connections can exhaust memory and terminate monitoring. This vulnerability is fixed in 2.11.0.

## 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)

- bb8f509e99cad230d3acc1fdfc840224f3b3db3a (Commit)

## Referenzen

- <https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2>
- <https://github.com/netdata/netdata/pull/22828>
- <https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7>
- <https://github.com/netdata/netdata/releases/tag/v2.11.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-83599) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_