CVE-2026-83599

7.5 highEPSS 0.7%

High (7.5). EPSS 0.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.7% chance of exploitation in the next 30 days; higher than 54% of CVEs (scores of 2026-10-31)
CWE: CWE-409
Published: 2026-09-22
Modified: 2026-09-23
Record from: the NVD, synced 2026-10-19

References

https://github.com/netdata/netdata/commit/e3811f7ee6e9fdfc4cbcb9929cab3f5d71d722d7
https://github.com/netdata/netdata/pull/22828
https://github.com/netdata/netdata/releases/tag/v2.11.0
https://github.com/netdata/netdata/security/advisories/GHSA-c8p4-cg3j-f4h2

Check your stack JSON