CVE-2026-83603highCWE-502CWE-73

CVE-2026-83603: high-severity vulnerability in netdata

Netdata: Local Root via ndsudo Arbitrary socket_path → fail2ban-client Pickle RCE

Published

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41Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 8.4epss 0.3%
from disclosure to weaponsame day
Published on NVDSep 22
1st PoCSep 2
Netdata is an open source observability tool. Prior to 2.10.4, the setuid-root ndsudo helper command fail2ban-client-status-socket in src/collectors/utils/ndsudo.c accepts a caller-controlled --socket_path from the low-privileged netdata service account. The account can direct root fail2ban-client to a malicious UNIX socket, and fail2ban/client/csocket.py CSocket.receive() passes the returned data to pickle.loads(), allowing attacker-controlled code to execute as root on systems with fail2ban-client installed. This issue is fixed in version 2.10.4 and nightly build 2.10.0-782-nightly.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Affected products
netdata · netdata
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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