CVE-2026-84192CWE-79cross-site-scripting

CVE-2026-84192

High · published September 1, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
25.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
CVSS v4.0
7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00331 · 25.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-01T16:17Z
References (3)
https://github.com/librenms/librenms/security/advisories/GHSA-7w8c-qgxg-m7jx · [email protected]https://www.vulncheck.com/advisories/librenms-before-26.3.1-stored-xss-via-snmp-syslog-data · [email protected]https://github.com/librenms/librenms/security/advisories/GHSA-7w8c-qgxg-m7jx · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 03 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 01 SEP 11:33Z
    LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data
    cvelistv5