{"apiVersion":"1.0","identifier":"CVE-2026-73973","description":"Linuxfabrik Monitoring Plugins provides monitoring plugins for Icinga, Nagios, and related systems. Prior to version 7.0.0, check-plugins/logfile/logfile accepted a free-form --filename path and opened it as root when invoked through the shipped nagios or icinga sudoers allowlist, without confining the resolved path to /var/log. An attacker who controls the monitoring account can select a root-readable file such as /etc/shadow and use --warning-regex . while leaving SUPPRESS_OUTPUT false, causing each nonempty line to be collected in warn_matches and returned through lib.base.oao(). The vulnerable flow passes the expanded scan_path directly to open(), and neither real-path containment nor an allowlist protects the sink. The same fix also confines mysql-logfile and openvpn-client-list paths, allows only documented log roots, and resolves symlinks and parent-directory traversal before checking containment. This issue is fixed in version 7.0.0.","publishedAt":"2026-08-18T22:17:33","lastModifiedAt":"2026-08-19T20:17:22","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73973","cvssScore":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","epssProbability":0.00215,"riskScore":0.56,"affectedProduct":"Linuxfabrik Monitoring Plugins","affectedVersions":"<7.0.0","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73973","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73973","en":"https://www.redsauce.net/en/cves/CVE-2026-73973","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73973","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73973","de":"https://www.redsauce.net/de/cves/CVE-2026-73973","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73973","el":"https://www.redsauce.net/el/cves/CVE-2026-73973"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73973"}}