CVE-2026-109354

MEDIUM 4.3

LibreNMS before 26.9.0 Path Traversal via NFSen channel Parameter

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

LibreNMS before 26.9.0 contains a path traversal vulnerability in nfsen_channel_common.inc.php that allows authenticated users to read unauthorized RRD data by injecting ../ sequences into the channel parameter. Attackers with access to one NFSen-enabled device can request graph.php with a traversed channel value to view traffic and NetFlow graphs of devices outside their authorized scope.

CWE	CWE-22
Vendor	librenms
Product	librenms
Published	Oct 12, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

librenms / librenms

0 < 26.9.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/librenms/librenms/security/advisories/GHSA-j3qf-h24w-9f42 vulncheck.com: https://www.vulncheck.com/advisories/librenms-before-26.9.0-path-traversal-via-nfsen-channel-parameter