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OpenAdvisories
Medium · 6.5 CVE-2026-83602 EUVD-2026-84562

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

Published Sep 22, 2026 · Updated Sep 28, 2026 · Assigned by GitHub_M

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 products

VendorProductAffectedFixed
netdata netdata >= 2.0.0, < 2.11.0 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 12 netdata No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS netdata No fix yet —
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 22.04 LTS netdata No fix yet —
Ubuntu Pro 20.04 LTS netdata No fix yet —
Ubuntu Pro 18.04 LTS netdata No fix yet —

References