---
id: CVE-2026-108715
title: >-
  LibreNMS through 26.9.1.1 contains an authorization bypass vulnerability in
  includes/html/graphs/smokeping/auth.inc.php that checks the src probe device
  instead of the rendered target device
summary: >-
  LibreNMS through 26.9.1.1 contains an authorization bypass vulnerability in
  includes/html/graphs/smokeping/auth.inc.php that checks the src probe device
  instead of the rendered target device. Restricted users permitted on a probe
  device …
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-639
published: '2026-10-11'
updated: '2026-10-11'
sourceUpdated: '2026-10-11T13:17:14.577'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-108715'
references:
  - url: 'https://github.com/librenms/librenms'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/librenms/librenms/blob/26.9.1.1/LibreNMS/Util/Graph.php#L190-L198
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/librenms/librenms/blob/26.9.1.1/includes/html/graphs/smokeping/auth.inc.php#L3-L7
    label: disclosure@vulncheck.com
  - url: >-
      https://hackmd.io/@haind/librenms-smokeping-graph-src-device-auth-confusion
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/librenms-through-26.9.1.1-authorization-bypass-via-smokeping-graph-auth-inc-php
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-11T13:51:17.025Z'
---

## Overview

LibreNMS through 26.9.1.1 contains an authorization bypass vulnerability in includes/html/graphs/smokeping/auth.inc.php that checks the src probe device instead of the rendered target device. Restricted users permitted on a probe device can request smokeping_in or smokeping_out graphs with arbitrary device ids to view latency data and enumerate device names.

## Remediation

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