---
title: "CVE-2026-83599: Netdata - Denial of Service"
description: "Netdata < 2.11.0 contains a denial of service caused by unbounded decompressed output growth in websocket_client_decompress_message() before authentication, letting unauthenticated attackers exhaust server memory via compressed WebSocket frames."
url: https://panop.io/threat-heartbeat/CVE-2026-83599/
---

# CVE-2026-83599 Netdata - Denial of Service

Netdata < 2.11.0 contains a denial of service caused by unbounded decompressed output growth in websocket\_client\_decompress\_message() before authentication, letting unauthenticated attackers exhaust server memory via compressed WebSocket frames.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.74% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-83599)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

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

Published

22 September 2026

Updated

15 October 2026

Weakness

[CWE-409](https://cwe.mitre.org/data/definitions/409.html)

## Vendor fix

Update to version 2.11.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-83599](https://nvd.nist.gov/vuln/detail/CVE-2026-83599)
- [https://github.com/netdata/netdata/pull/22828](https://github.com/netdata/netdata/pull/22828)
- [https://github.com/netdata/netdata/releases/tag/v2.11.0](https://github.com/netdata/netdata/releases/tag/v2.11.0)
- [https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2](https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2)
- [https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7](https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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