CVE-2026-84193 PUBLISHED

LibreNMS through 26.2.0 Stored Cross-Site Scripting via SNMP

Assigner: VulnCheck
Reserved: 01.09.2026 Published: 01.09.2026 Updated: 01.09.2026

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.

Metrics

CVSS 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
CVSS Score: 5.8

Product Status

Vendor librenms
Product librenms
Versions Default: unaffected
  • affected from 0 to 26.2.0 (incl.)

Credits

  • dimashn04 reporter

References

Problem Types

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