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CVE-2026-83603

8.4 · HIGH

Netdata is an open source observability tool.

Published Sep 22, 2026CWE-73EPSS 0.32%

Overview

CVE-2026-83603 is a high-severity vulnerability. It was published on September 22, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/netdata/netdata/commit/9bced8d46464bd0fe01b0b5f8c63c4ac24e9b060GitHubgithub.com/netdata/netdata/pull/22745GitHubgithub.com/netdata/netdata/releases/tag/v2.10.4GitHubgithub.com/netdata/netdata/security/advisories/GHSA-qwh9-pq27-993w

How CyberStrike helps

Frequently asked questions

What is CVE-2026-83603?

CVE-2026-83603 is a high-severity vulnerability. It was published on September 22, 2026 and has a CVSS 3.1 base score of 8.4 (HIGH).

How severe is CVE-2026-83603?

This vulnerability has a CVSS 3.1 base score of 8.4, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-83603?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-83603?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-83603 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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