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TI-2026-57699 Aliases CVE-2026-83599

Netdata: WebSocket Decompression Bomb

Priority MEDIUM 40CWE-409Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00742 54th percentileScored 2026-11-07
Fix Fixed netdata (netdata): 2.11.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
netdatanetdatabefore 2.11.02.11.0Patch availableCNA
  • netdata Vendornetdata Affected before 2.11.0 Fixed in 2.11.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:netdata:netdata:*:*:*:*:*:*:*:*——netdata
  • cpe:2.3:a:netdata:netdata:*:*:*:*:*:*:*:* Versions — — ·netdata

Remediation

  • Fix · CNA netdata (netdata) Fixed in 2.11.0

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-83599

References

Other 4

  • TI-2023-08744 Netdata vulnerable to command injection CVSS 3.1CRITICAL 9.8
  • TI-2024-21114 ndsudo: local privilege escalation via untrusted search path CVSS 3.1HIGH 8.8
  • TI-2023-08745 Netdata is vulnerable to improper authentication CVSS 3.1CRITICAL 9.1
  • TI-2026-57702 Netdata: Unauthenticated remote PUT to /api/v3/settings bypasses IP allowlist controls via HTTP_ACL_NOCHECK CVSS 3.1MEDIUM 6.5
  • TI-2026-57701 Netdata: Streaming protocol dimension slot has no upper-bound guard, allowing integer overflow and out-of-bounds write CVSS 3.1MEDIUM 6.5
  • TI-2026-57700 Netdata: Streaming protocol chart slot guard off-by-one allows ~16 GiB allocation request, crashing parent agent CVSS 3.1MEDIUM 6.5
See all 11 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences