{"id":"UBUNTU-CVE-2026-83599","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.","modified":"2026-09-24T02:01:04.669541950Z","published":"2026-09-22T17:17:00Z","upstream":["CVE-2026-83599"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-83599"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-83599"},{"type":"REPORT","url":"https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7"},{"type":"REPORT","url":"https://github.com/netdata/netdata/pull/22828"},{"type":"REPORT","url":"https://github.com/netdata/netdata/releases/tag/v2.11.0"},{"type":"REPORT","url":"https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2"}],"affected":[{"package":{"name":"netdata","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/netdata?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.0+dfsg-1","1.8.0+dfsg-1","1.9.0+dfsg-1","1.9.0+dfsg-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.9.0+dfsg-1ubuntu0.1~esm1","binary_name":"netdata"},{"binary_name":"netdata-data","binary_version":"1.9.0+dfsg-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83599.json"}},{"package":{"name":"netdata","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/netdata?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.16.1-2","1.19.0-3ubuntu1","1.19.0-3ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"netdata","binary_version":"1.19.0-3ubuntu1+esm1"},{"binary_name":"netdata-apache2","binary_version":"1.19.0-3ubuntu1+esm1"},{"binary_name":"netdata-core","binary_version":"1.19.0-3ubuntu1+esm1"},{"binary_version":"1.19.0-3ubuntu1+esm1","binary_name":"netdata-plugins-bash"},{"binary_version":"1.19.0-3ubuntu1+esm1","binary_name":"netdata-plugins-nodejs"},{"binary_version":"1.19.0-3ubuntu1+esm1","binary_name":"netdata-plugins-python"},{"binary_name":"netdata-web","binary_version":"1.19.0-3ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83599.json"}},{"package":{"name":"netdata","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/netdata?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.29.3-4","1.31.0-4","1.33.1-1ubuntu1","1.33.1-1ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"netdata","binary_version":"1.33.1-1ubuntu1+esm1"},{"binary_version":"1.33.1-1ubuntu1+esm1","binary_name":"netdata-apache2"},{"binary_name":"netdata-core","binary_version":"1.33.1-1ubuntu1+esm1"},{"binary_name":"netdata-plugins-bash","binary_version":"1.33.1-1ubuntu1+esm1"},{"binary_version":"1.33.1-1ubuntu1+esm1","binary_name":"netdata-plugins-nodejs"},{"binary_name":"netdata-plugins-python","binary_version":"1.33.1-1ubuntu1+esm1"},{"binary_name":"netdata-web","binary_version":"1.33.1-1ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83599.json"}},{"package":{"name":"netdata","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/netdata?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.42.1-1","1.43.1-1","1.43.2-1","1.43.2-1build1","1.43.2-1build2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.43.2-1build2","binary_name":"netdata"},{"binary_version":"1.43.2-1build2","binary_name":"netdata-apache2"},{"binary_version":"1.43.2-1build2","binary_name":"netdata-core"},{"binary_version":"1.43.2-1build2","binary_name":"netdata-plugins-bash"},{"binary_name":"netdata-plugins-python","binary_version":"1.43.2-1build2"},{"binary_name":"netdata-web","binary_version":"1.43.2-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-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"},{"type":"Ubuntu","score":"medium"}]}