CVE-2026-84194None▾ Sunlit

LibreNMS versions >= 23.10.0 and < 26.2.0 (fixed in 26.4.0) contain an authenticated OS command injection vulnerability in libvirt discovery

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0.3 · exploitation 0

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Proof of concept

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Published

Sep 1, 2026

Updated

Sep 8, 2026

CVSS

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Vendor

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Product

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CWE

CWE-78

Depth score

3 · Minimal

EPSS

1.5% · p75

Platforms

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Source

NVD

Vector

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EPSS history

Exploit-prediction probability, daily snapshots since Sep 8.

1.4% → 1.5%▲ 0.1%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 24 days

Sep 1, 2026Published
Disclosed via NVD
Sep 8, 2026Record revised
Last analysed / modified upstream
Sep 8, 2026EPSS first tracked
1.4%
Sep 25, 2026EPSS peak
1.4% → 1.5%

CWE-78 #nvd

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd

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