CVE-2026-84188

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.

CVSS Vector

References

• https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632
• https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-graph-descr-settings