{"id":"CVE-2026-83602","state":"PUBLISHED","title":"Netdata: Unauthenticated remote PUT to /api/v3/settings bypasses IP allowlist controls via HTTP_ACL_NOCHECK","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.","publishedAt":"2026-09-22T16:56:56.878Z","updatedAt":"2026-09-28T19:29:02.173Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["netdata netdata"],"affected":[{"vendor":"netdata","product":"netdata","versions":[{"version":">= 2.0.0, < 2.11.0","status":"affected"}]}],"references":["https://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp","https://github.com/netdata/netdata/pull/22896","https://github.com/netdata/netdata/commit/0124f50bbcf36c23e798e2b76f021f5032ec93d4","https://github.com/netdata/netdata/releases/tag/v2.11.0"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/83xxx/CVE-2026-83602.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-83602","state":"PUBLISHED","datePublished":"2026-09-22T16:56:56.878Z","dateUpdated":"2026-09-28T19:29:02.173Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-31T20:36:25.743Z"},"containers":{"cna":{"title":"Netdata: Unauthenticated remote PUT to /api/v3/settings bypasses IP allowlist controls via HTTP_ACL_NOCHECK","descriptions":[{"lang":"en","value":"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":[{"vendor":"netdata","product":"netdata","versions":[{"version":">= 2.0.0, < 2.11.0","status":"affected"}]}],"references":[{"url":"https://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp","name":"https://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/netdata/netdata/pull/22896","name":"https://github.com/netdata/netdata/pull/22896","tags":["x_refsource_MISC"]},{"url":"https://github.com/netdata/netdata/commit/0124f50bbcf36c23e798e2b76f021f5032ec93d4","name":"https://github.com/netdata/netdata/commit/0124f50bbcf36c23e798e2b76f021f5032ec93d4","tags":["x_refsource_MISC"]},{"url":"https://github.com/netdata/netdata/releases/tag/v2.11.0","name":"https://github.com/netdata/netdata/releases/tag/v2.11.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-22T16:56:56.878Z"},"source":{"advisory":"GHSA-8hjg-8hcf-fmwp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/netdata/netdata/security/advisories/GHSA-8hjg-8hcf-fmwp","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-28T19:28:42.778057Z","id":"CVE-2026-83602","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-28T19:29:02.173Z"}}]}}}