CVE-2026-84191
LibreNMS before 26.5.0 Stored XSS via SNMP VRF fields
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
LibreNMS before 26.5.0 contains stored cross-site scripting vulnerabilities in VRF display pages where mplsVpnVrfDescription, vrf_name, and mplsVpnVrfRouteDistinguisher fields from SNMP polling are rendered without sanitization. Attackers controlling a monitored network device can inject arbitrary JavaScript through SNMP responses that executes in the browser of any user viewing VRF-related pages.
| CWE | CWE-79 |
| Vendor | librenms |
| Product | librenms |
| Published | Sep 1, 2026 |
| Last Updated | Sep 1, 2026 |
Stay Ahead of the Next One
Get instant alerts for librenms librenms
Be the first to know when new medium vulnerabilities affecting librenms librenms are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
librenms / librenms
0 < 26.5.0
References
Credits
🔍 romain-deperne