{"id":"CVE-2026-83599","summary":"Netdata: WebSocket Decompression Bomb","details":"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.","aliases":["GHSA-c8p4-cg3j-f4h2"],"modified":"2026-09-23T03:47:31.888163028Z","published":"2026-09-22T16:54:56.419Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83599.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-409"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83599.json"},{"type":"FIX","url":"https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7"},{"type":"FIX","url":"https://github.com/netdata/netdata/pull/22828"},{"type":"WEB","url":"https://github.com/netdata/netdata/releases/tag/v2.11.0"},{"type":"ADVISORY","url":"https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83599"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/netdata/netdata","events":[{"introduced":"0"},{"fixed":"bb8f509e99cad230d3acc1fdfc840224f3b3db3a"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.11.0"}],"source":"AFFECTED_FIELD"}}],"versions":["v2.10.0","v2.9.0","v2.8.0","v2.7.0","v2.6.0","v2.5.0","v2.4.0","v2.3.0","v2.2.0","v2.1.0","v2.0.0","v1.47.0","v1.99.0","v1.46.0","v1.45.0","v1.44.0","v1.43.0","v1.42.0","v1.41.0","v1.40.0","v1.39.0","v1.38.0","v1.37.0","v1.36.0","v1.35.0","v1.34.0","1.34.0","v1.33.1","v1.33.0","v1.32.1","1.32.1","v1.32.0","v1.31.0","v1.30.1","v1.30.0","v1.29.3","v1.29.2","v1.29.1","v1.29.0","v1.27.0_0104103941","v1.28.0","v1.27.0","v1.26.0","v1.25.0","v1.24.0","v1.23.2","v1.23.1_infiniband","v1.23.1","v1.23.0","v1.22.1","v1.22.0","v1.21.1","v1.21.0","v1.20.0","v1.19.0","v1.18.1","v1.18.0","v1.17.1","v1.17.0","v1.16.1","v1.16.0","v1.15.0","v1.14.0","v1.14.0-rc0","v1.13.0","v1.12.2","v1.12.1","v1.12.0","v1.12.0-rc3","v1.12.0-rc2","v1.12.0-rc1","v1.12.0-rc0","v1.11.1","v1.11.0","v1.10.0","untagged-10d59b9e5fa68b9500e1","v1.9.0","v1.8.0","v1.7.0","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.1.0","v1.0.0","v1.0rc","v0.2","v0.1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-83599.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}