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CVE-2026-83599 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7	[email protected]
https://github.com/netdata/netdata/pull/22828	[email protected]
https://github.com/netdata/netdata/releases/tag/v2.11.0	[email protected]
https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-409	Improper Handling of Highly Compressed Data (Data Amplification)	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 22, 2026	CVE Modified	CISA-ADP
Sep 22, 2026	New CVE Received	[email protected]