CVE catalog

CVE-2026-83599

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Sep 22, 2026, 4:54:56 PM UTC
Updated: Sep 22, 2026, 5:17:25 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.74% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	netdata	bookworm	`1.37.1-2`	not affected
Ubuntu	netdata	pro	`1.29.3-4`	vulnerable
Ubuntu	netdata	pro	`1.31.0-4`	vulnerable
Ubuntu	netdata	pro	`1.33.1-1ubuntu1`	vulnerable
Ubuntu	netdata	pro	`1.33.1-1ubuntu1+esm1`	vulnerable
Ubuntu	netdata	24.04	`1.42.1-1`	vulnerable
Ubuntu	netdata	24.04	`1.43.1-1`	vulnerable
Ubuntu	netdata	24.04	`1.43.2-1`	vulnerable
Ubuntu	netdata	24.04	`1.43.2-1build1`	vulnerable
Ubuntu	netdata	24.04	`1.43.2-1build2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	netdata	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[netdata]Affected
Details (2)
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
[netdata-apache2]Affected
Source package: [netdata]
Details (2)
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
[netdata-core]Affected
Source package: [netdata]
Details (2)
- 1.37.1-2 · amd64 · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
- 1.37.1-2 · arm64 · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
[netdata-plugins-bash]Affected
Source package: [netdata]
Details (2)
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
[netdata-plugins-python]Affected
Source package: [netdata]
Details (2)
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
[netdata-web]Affected
Source package: [netdata]
Details (2)
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12
- 1.37.1-2 · all · bookworm
  Affected
  nvd · netdata · debian · bookworm; nvd · netdata · debian · 12

Observed: Oct 23, 2026, 8:36:13 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]