Improper Handling of Highly Compressed Data (Data Amplification) Affecting netdata package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN12-NETDATA-20047238
- published23 Sept 2026
- disclosed22 Sept 2026
Introduced: 22 Sep 2026
NewCVE-2026-83599 (opens in a new tab)How to fix?
There is no fixed version for Debian:12 netdata.
NVD Description
Note: Versions mentioned in the description apply only to the upstream netdata package and not the netdata package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-83599
- 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