LibreNMS versions <= 26.4.0 contain a stored cross-site scripting vulnerability in the graph_descr.<graphtype> configuration settings, which are… (CVE-2026-84188)
Description
LibreNMS versions up to and including 26.4.0 contain a stored cross-site scripting (XSS) vulnerability in the graph_descr.<graphtype> configuration settings. This vulnerability allows an administrator to store malicious HTML payloads that execute in the browsers of authenticated users viewing the affected graph type. The vulnerability is fixed in version 26.7.0.
CVSS v3.1
Score 4.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in LibreNMS (CVE-2026-84188) is a stored cross-site scripting (XSS) issue found in the graph_descr.<graphtype> configuration settings. These settings are echoed without HTML escaping in includes/html/pages/graphs.inc.php, allowing an administrator to inject malicious HTML that executes in the browser context of any authenticated user who views the affected graph. This flaw affects versions up to and including 26.4.0 and is resolved in version 26.7.0.
Potential Impact
An attacker with administrator privileges can inject malicious HTML/JavaScript code that executes in the browsers of authenticated users viewing the affected graph type. This can lead to limited confidentiality and integrity impacts within the context of the affected users' sessions. There is no impact on availability. The CVSS score is 4.8 (medium severity).
Mitigation Recommendations
Upgrade LibreNMS to version 26.7.0 or later, where this vulnerability is fixed. No other mitigations are specified or required.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pvwj-jwv3-68ww
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-84188"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6a96f307acd9273b49e490f3
Added to database: 09/01/2026, 15:45:11 UTC
Last enriched: 09/08/2026, 15:23:35 UTC
Last updated: 10/17/2026, 18:48:23 UTC
Views: 26
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