CVE-2026-84194 (GCVE-0-2026-84194)

Vulnerability from cvelistv5 – Published: 2026-09-01 11:33 – Updated: 2026-09-04 01:52
VLAI
Title
LibreNMS 23.10.0 before 26.4.0 OS Command Injection via Hostname
Summary
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.
Severity
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
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 01:51 UTC
CWE
  • CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6476 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
librenms librenms Affected: 23.10.0 , < 26.4.0 (semver)
Unaffected: 26.4.0 (semver)
    cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-04 00:00
Credits
0xCraig
Show details on NVD website
To clipboard 

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