LibreNMS through 26.2.0 contains a stored cross-site scripting vulnerability in legacy PHP template pages that render unescaped SNMP-sourced data fields including BGP peer descriptions, VRF names, process information, and SLA tags. Attackers with device management access or network access to enroll a rogue SNMP device can inject malicious JavaScript that executes when admins view affected routing and device pages, enabling credential theft and CSRF token exfiltration.

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History

Tue, 01 Sep 2026 11:45:00 +0000

Type Values Removed Values Added
Description LibreNMS through 26.2.0 contains a stored cross-site scripting vulnerability in legacy PHP template pages that render unescaped SNMP-sourced data fields including BGP peer descriptions, VRF names, process information, and SLA tags. Attackers with device management access or network access to enroll a rogue SNMP device can inject malicious JavaScript that executes when admins view affected routing and device pages, enabling credential theft and CSRF token exfiltration.
Title LibreNMS through 26.2.0 Stored Cross-Site Scripting via SNMP
First Time appeared Librenms
Librenms librenms
Weaknesses CWE-79
CPEs cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*
Vendors & Products Librenms
Librenms librenms
References
Metrics cvssV4_0

{'score': 5.8, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-01T11:33:57.100Z

Reserved: 2026-09-01T10:51:59.729Z

Link: CVE-2026-84193

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-01T12:17:48.867

Modified: 2026-09-01T12:17:48.867

Link: CVE-2026-84193

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-01T12:45:12Z

Weaknesses