---
id: CVE-2026-83603
title: Netdata is an open source observability tool
summary: >-
  Netdata is an open source observability tool. Prior to 2.10.4, the setuid-root
  ndsudo helper command fail2ban-client-status-socket in
  src/collectors/utils/ndsudo.c accepts a caller-controlled --socket_path from
  the low-privileged netdata…
severity: high
cvss: 8.4
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-73
  - CWE-502
vendor: netdata
product: netdata
affected:
  - netdata < 2.10.4
published: '2026-09-22'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:28:25.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83603'
references:
  - url: >-
      https://github.com/netdata/netdata/commit/9bced8d46464bd0fe01b0b5f8c63c4ac24e9b060
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/pull/22745'
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/releases/tag/v2.10.4'
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/security/advisories/GHSA-qwh9-pq27-993w'
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83603.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-83603'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-83603'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00349
epssPercentile: 0.25769
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-22T17:35:38.430711Z'
ingestedAt: '2026-09-22T18:08:12.468Z'
---

## Overview

Netdata is an open source observability tool. Prior to 2.10.4, the setuid-root ndsudo helper command fail2ban-client-status-socket in src/collectors/utils/ndsudo.c accepts a caller-controlled --socket_path from the low-privileged netdata service account. The account can direct root fail2ban-client to a malicious UNIX socket, and fail2ban/client/csocket.py CSocket.receive() passes the returned data to pickle.loads(), allowing attacker-controlled code to execute as root on systems with fail2ban-client installed. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83603.json)