{"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":"2026-09-28","sourceUpdated":"2026-09-28T20:17:10.933","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://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"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","exploit-available","csaf","vex","red-hat"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-28T19:28:42.778057Z"},"scores":{"nvd":6.5,"vendor":8.2},"ingestedAt":"2026-09-22T17:07:07.378Z","epss":0.00357,"epssPercentile":0.29219,"slug":"CVE-2026-83602","body":"## Overview\n\nNetdata 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-83602.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":212124,"id":"CVE-2026-83602","ts":1790626841350,"field":"exploit_available","old":"false","new":"true"}]}