What’s Vulnerable › Vulnerabilities

CVE-2026-83603: Netdata: Local Root via ndsudo Arbitrary socket_path → fail2ban-client Pickle RCE

• Severity: high (CVSS 8.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-22 · updated 2026-09-23
• Weakness: CWE-73

Description

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.

Affected products

• netdata: before 2.10.4

References

• https://github.com/netdata/netdata/commit/9bced8d46464bd0fe01b0b5f8c63c4ac24e9b060
• https://github.com/netdata/netdata/pull/22745
• https://github.com/netdata/netdata/releases/tag/v2.10.4
• https://github.com/netdata/netdata/security/advisories/GHSA-qwh9-pq27-993w

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