LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data
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.
CVE-2026-84192
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-84192
librenms
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "librenms",
"product": "librenms",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "26.3.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "26.3.1",
"versionType": "semver"
}
],
"packageURL": "pkg:composer/librenms/librenms",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-84192
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12936 · Revision 1
- Added to Heist Feed
- Publisher date