{"id":"CVE-2026-83599","published":"2026-09-22T17:17:25.957","lastModified":"2026-09-23T18:28:25.093","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-409"],"vendors":[],"products":[],"references":[{"url":"https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7","tags":[]},{"url":"https://github.com/netdata/netdata/pull/22828","tags":[]},{"url":"https://github.com/netdata/netdata/releases/tag/v2.11.0","tags":[]},{"url":"https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2","tags":[]}],"exploitRefs":[{"url":"https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7","tags":[]},{"url":"https://github.com/netdata/netdata/pull/22828","tags":[]},{"url":"https://github.com/netdata/netdata/releases/tag/v2.11.0","tags":[]},{"url":"https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2","tags":[]}],"hasPoc":true,"ai":null}