{"id":"CVE-2026-83599","state":"PUBLISHED","title":"Netdata: WebSocket Decompression Bomb","description":"Netdata is an open source observability tool. Prior to 2.11.0, Netdata's unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocket_client_decompress_message() to grow decompressed output toward WS_MAX_DECOMPRESSED_SIZE without enforcing a compressed-to-decompressed ratio. Small highly compressed frames can therefore cause large server-side allocations, and repeated concurrent connections can exhaust memory and terminate monitoring. This vulnerability is fixed in 2.11.0.","publishedAt":"2026-09-22T16:54:56.419Z","updatedAt":"2026-09-22T17:43:29.548Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["netdata netdata"],"affected":[{"vendor":"netdata","product":"netdata","versions":[{"version":"< 2.11.0","status":"affected"}]}],"references":["https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2","https://github.com/netdata/netdata/pull/22828","https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7","https://github.com/netdata/netdata/releases/tag/v2.11.0"],"weaknesses":["CWE-409"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/83xxx/CVE-2026-83599.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-83599","state":"PUBLISHED","datePublished":"2026-09-22T16:54:56.419Z","dateUpdated":"2026-09-22T17:43:29.548Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-31T20:36:25.743Z"},"containers":{"cna":{"title":"Netdata: WebSocket Decompression Bomb","descriptions":[{"lang":"en","value":"Netdata is an open source observability tool. Prior to 2.11.0, Netdata's unauthenticated WebSocket server negotiates permessage-deflate before authentication, and src/web/websocket/websocket-compression.c allows websocket_client_decompress_message() to grow decompressed output toward WS_MAX_DECOMPRESSED_SIZE without enforcing a compressed-to-decompressed ratio. Small highly compressed frames can therefore cause large server-side allocations, and repeated concurrent connections can exhaust memory and terminate monitoring. This vulnerability is fixed in 2.11.0."}],"affected":[{"vendor":"netdata","product":"netdata","versions":[{"version":"< 2.11.0","status":"affected"}]}],"references":[{"url":"https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2","name":"https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/netdata/netdata/pull/22828","name":"https://github.com/netdata/netdata/pull/22828","tags":["x_refsource_MISC"]},{"url":"https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7","name":"https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7","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":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-409","lang":"en","description":"CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-22T16:54:56.419Z"},"source":{"advisory":"GHSA-c8p4-cg3j-f4h2","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T17:36:21.063916Z","id":"CVE-2026-83599","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-22T17:43:29.548Z"}}]}}}