SEPTEMBER 17, 2026
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Case File

CVE-2026-84188

MEDIUM · CVSS 4.8 EPSS 0.18% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-17

CyberRota Analysis

AI-Generated

LibreNMS versions up to 26.4.0 are vulnerable to a stored cross-site scripting (XSS) flaw in the graph configuration settings, allowing an attacker to inject malicious HTML that executes in the browsers of authenticated users viewing the affected graphs. This vulnerability poses a risk of unauthorized actions or data exposure for users interacting with the compromised graphs. Administrators using affected versions should prioritize upgrading to version 26.7.0 to mitigate this security risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-84188
Severity
MEDIUM
CVSS
4.8
EPSS
0.18%

Original NVD Description

LibreNMS versions <= 26.4.0 contain a stored cross-site scripting vulnerability in the graph_descr.<graphtype> configuration settings, which are echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php. An administrator can store a malicious HTML payload that executes in the browser of any authenticated user who views the affected graph type. The issue is fixed in version 26.7.0.