CVE-2026-84194
LibreNMS 23.10.0 before 26.4.0 OS Command Injection via Hostname
- State
- Published
- Severity
- 8.6 High
- Published
- Sep 1, 2026
- Updated
- Sep 4, 2026
- Reserved
- Sep 1, 2026
Description
LibreNMS versions >= 23.10.0 and < 26.2.0 (fixed in 26.4.0) contain an authenticated OS command injection vulnerability in libvirt discovery. When libvirt support is enabled (enable_libvirt=true), the device hostname ($this->getDevice()->hostname) is concatenated into shell commands (ssh, virsh list/dumpxml/domstate) in VminfoLibvirt.php and passed to exec() without escapeshellarg() or argument separation. An authenticated admin can set a crafted device hostname to inject arbitrary OS commands, leading to remote code execution in the discovery worker context.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L | VulnCheck |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
librenmslibrenms |
|
References
- GitHub Security Advisory (GHSA-wff2-9gjr-95f3)vendor-advisory
- VulnCheck Advisory: LibreNMS 23.10.0 before 26.4.0 OS Command Injection via Hostnamethird-party-advisory
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