---
id: CVE-2026-109354
title: >-
  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
summary: >-
  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 …
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-22
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:32.573'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109354'
references:
  - url: >-
      https://github.com/librenms/librenms/security/advisories/GHSA-j3qf-h24w-9f42
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/librenms-before-26.9.0-path-traversal-via-nfsen-channel-parameter
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.212Z'
---

## Overview

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.

## Remediation

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