CVE-2026-83599
Netdata: WebSocket Decompression Bomb
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-409 |
| Vendor | netdata |
| Product | netdata |
| Published | Sep 22, 2026 |
| Last Updated | Sep 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
netdata / netdata
< 2.11.0
References
github.com: https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2 github.com: https://github.com/netdata/netdata/pull/22828 github.com: https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7 github.com: https://github.com/netdata/netdata/releases/tag/v2.11.0