CVE-2026-84192

Description

LibreNMS before 26.3.1 contains a stored cross-site scripting vulnerability in legacy PHP templates that output SNMP-sourced and syslog-sourced data without escaping. An attacker who controls a monitored network device can inject arbitrary JavaScript through SNMP interface descriptions or syslog program fields that executes when authenticated users view affected pages.

CVSS Vector

References

• https://github.com/librenms/librenms/security/advisories/GHSA-7w8c-qgxg-m7jx
• https://www.vulncheck.com/advisories/librenms-before-26.3.1-stored-xss-via-snmp-syslog-data
• https://github.com/librenms/librenms/security/advisories/GHSA-7w8c-qgxg-m7jx