Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109354LibreNMS before 26.9.0 Path Traversal via NFSen channel Parameter

Medium 4.3

In plain English

A medium-severity path traversal in librenms from librenms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.3%top 80.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
librenms	librenms	0 – before 26.9.0

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

GitHub Security Advisory (GHSA-j3qf-h24w-9f42) vendor-advisory
VulnCheck Advisory: LibreNMS before 26.9.0 Path Traversal via NFSen channel Parameter third-party-advisory