CVE-2026-83599

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-83599", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-31T20:36:25.743Z", "datePublished": "2026-09-22T16:54:56.419Z", "dateUpdated": "2026-09-22T17:43:29.548Z"}, "containers": {"cna": {"title": "Netdata: WebSocket Decompression Bomb", "problemTypes": [{"descriptions": [{"cweId": "CWE-409", "lang": "en", "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)", "type": "CWE"}]}], "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"}}], "references": [{"name": "https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2"}, {"name": "https://github.com/netdata/netdata/pull/22828", "tags": ["x_refsource_MISC"], "url": "https://github.com/netdata/netdata/pull/22828"}, {"name": "https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7", "tags": ["x_refsource_MISC"], "url": "https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7"}, {"name": "https://github.com/netdata/netdata/releases/tag/v2.11.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/netdata/netdata/releases/tag/v2.11.0"}], "affected": [{"vendor": "netdata", "product": "netdata", "versions": [{"version": "< 2.11.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-22T16:54:56.419Z"}, "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."}], "source": {"advisory": "GHSA-c8p4-cg3j-f4h2", "discovery": "UNKNOWN"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-22T17:43:29.548Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-83599", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-22T17:36:21.063916Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-22T17:36:27.558Z"}}], "cna": {"title": "Netdata: WebSocket Decompression Bomb", "source": {"advisory": "GHSA-c8p4-cg3j-f4h2", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}}], "affected": [{"vendor": "netdata", "product": "netdata", "versions": [{"status": "affected", "version": "< 2.11.0"}]}], "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"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-409", "description": "CWE-409: Improper Handling of Highly Compressed Data (Data Amplification)"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-22T16:54:56.419Z"}}}, "cveMetadata": {"cveId": "CVE-2026-83599", "state": "PUBLISHED", "dateUpdated": "2026-09-22T17:43:29.548Z", "dateReserved": "2026-08-31T20:36:25.743Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-22T16:54:56.419Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "netdata", "vendor": "netdata", "versions": [{"status": "affected", "version": "< 2.11.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-83599", "lastModified": "2026-09-23T18:28:25.093", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-83599", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-22T17:36:21.063916Z", "version": "2.0.3"}}]}, "published": "2026-09-22T17:17:25.957", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7"}, {"source": "security-advisories@github.com", "url": "https://github.com/netdata/netdata/pull/22828"}, {"source": "security-advisories@github.com", "url": "https://github.com/netdata/netdata/releases/tag/v2.11.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-409"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.11.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "netdata", "source": "cna", "vendor": "netdata"}, "product": "netdata", "vendor": "netdata"}], "created": "2026-09-22T18:45:18.491697+00:00", "updated": "2026-09-22T18:45:18.931859+00:00", "vendors": ["netdata", "netdata$PRODUCT$netdata"]}