{"id":"CVE-2026-83603","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-83603","generatedAt":"2026-10-28T10:36:29.604Z","title":"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…","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.","published":"2026-09-22T17:17:27.000Z","lastModified":"2026-09-23T18:28:25.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":8.4,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"},"cwe":["CWE-73","CWE-502"],"affected":[],"epss":{"score":0.0032,"percentile":0.24882,"date":"2026-10-27","history":[{"date":"2026-09-23","score":0.00349,"percentile":0.2864}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.32%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-22T17:17:27.000Z","detail":{"score":"8.4","severity":"HIGH","publishedAt":"2026-09-22T17:17:26.550Z"},"summary":"New CVE, high severity (CVSS 8.4)."}],"references":[{"url":"https://github.com/netdata/netdata/commit/9bced8d46464bd0fe01b0b5f8c63c4ac24e9b060","source":"security-advisories@github.com"},{"url":"https://github.com/netdata/netdata/pull/22745","source":"security-advisories@github.com"},{"url":"https://github.com/netdata/netdata/releases/tag/v2.10.4","source":"security-advisories@github.com"},{"url":"https://github.com/netdata/netdata/security/advisories/GHSA-qwh9-pq27-993w","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-83603","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}