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Vulnerability · Published Sep 22, 2026 · Assigned by GitHub_M

CVE-2026-83602Netdata: Unauthenticated remote PUT to /api/v3/settings bypasses IP allowlist controls via HTTP_ACL_NOCHECK

Medium 6.5

In plain English

A medium-severity improper access control in netdata from netdata. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 70.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12netdatano fix listedDEBIAN-CVE-2026-83602
Ubuntu:24.04:LTSnetdatano fix listedUBUNTU-CVE-2026-83602

Affected products (as reported)

VendorProductVersions
netdata netdata >= 2.0.0, < 2.11.0

Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

References