What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-22 · updated 2026-09-28
• Weakness: CWE-284

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

• netdata: from 2.0.0, < 2.11.0

References

• https://github.com/netdata/netdata/commit/0124f50bbcf36c23e798e2b76f021f5032ec93d4
• https://github.com/netdata/netdata/pull/22896
• https://github.com/netdata/netdata/releases/tag/v2.11.0
• https://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp
• https://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp

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