CVE-2026-84188

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 4.0

4.8CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

4.8CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-25)

CWE

CWE-79

Published

2026-09-01

Modified

2026-10-08

Record from

the NVD, synced 2026-10-19

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
• https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632

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