---
id: CVE-2026-83602
title: Netdata is an open source observability tool
summary: >-
  Netdata is an open source observability tool. From 2.0.0 until 2.11.0, Netdata
  registers /api/v3/settings in src/web/api/v3/web_api_v3.c with
  HTTP_ACL_NOCHECK and HTTP_ACCESS_ANONYMOUS_DATA, causing unauthenticated PUT
  requests handled b…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-284
vendor: netdata
product: netdata
affected:
  - 'netdata >= 2.0.0, < 2.11.0'
published: '2026-09-22'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T21:19:05.340'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-83602'
references:
  - url: >-
      https://github.com/netdata/netdata/commit/0124f50bbcf36c23e798e2b76f021f5032ec93d4
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/pull/22896'
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/releases/tag/v2.11.0'
    label: security-advisories@github.com
  - url: 'https://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp'
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83602.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-83602'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-83602'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.0051
epssPercentile: 0.40948
scores:
  nvd: 6.5
  vendor: 8.2
ingestedAt: '2026-09-22T17:07:07.378Z'
---

## Overview

Netdata is an open source observability tool. From 2.0.0 until 2.11.0, Netdata registers /api/v3/settings in src/web/api/v3/web_api_v3.c with HTTP_ACL_NOCHECK and HTTP_ACCESS_ANONYMOUS_DATA, causing unauthenticated PUT requests handled by src/web/api/v3/api_v3_settings.c to bypass operator-configured allow dashboard from IP restrictions. A network-reachable caller can persist attacker-controlled JSON in {varlib}/settings/default.json, manipulate its version counter, and use repeated near-20 MiB writes to consume disk space, although the file does not control collection or security policy. This vulnerability is fixed in 2.11.0.

## 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-2026-83602.json)