CVE-2026-84192

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 v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-01 12:17

Updated : 2026-09-08 20:18

NVD link : CVE-2026-84192

Mitre link : CVE-2026-84192

CVE.ORG link : CVE-2026-84192

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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