CVE-2026-109354

Medium

Description

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.

SeverityMedium

CVSS4.3

Exploit probability—

ProductLibrenms

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

librenms librenms26.9.0 or later

Vendor advisories

github.com/librenms/librenms/security/advisories/GHSA-j3qf-h24w-9f42

Affected products

Product	Affected versions	Fixed in
librenms librenms	v < 26.9.0	26.9.0

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