High 8.6Published Sep 1, 2026

CVE-2026-84194LibreNMS 23.10.0 before 26.4.0 OS Command Injection via Hostname

Updated under an hour ago (2026-10-19 09:50 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.6 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Sep 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

librenms librenms librenms:librenms (from the name)	from 23.10.0 before 26.4.0; 26.4.0 not affected	CNA record

References

https://github.com/librenms/librenms/security/advisories/GHSA-wff2-9gjr-95f3vendor-advisory
https://www.vulncheck.com/advisories/librenms-23.10.0-before-26.4.0-os-command-injection-via-hostnamethird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.