High
LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-84192
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 17:03 UTC · Revision 1
Source evidence
LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data
core-osv · Original sourcePublished 1 Sept 2026, 11:33 UTC
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.
osv:CVE-2026-84192
Complete source record
{
"id": "67107d8d9fd90e7ac17d96389c5b9ddf11589e90da72fe55a4cc152586e67eb8",
"url": "https://osv.dev/vulnerability/CVE-2026-84192",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "LibreNMS before 26.3.1 Stored XSS via SNMP/Syslog Data",
"summary": "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.",
"evidence": "osv:CVE-2026-84192",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-84192",
"aliases": [
"CVE-2026-84192",
"GHSA-7w8c-qgxg-m7jx"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/librenms/librenms",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "246f795d966f2d7f390b1fcb6249d8a4510f14db"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "26.3.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0"
},
{
"fixed": "26.3.1"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
"26.3.0",
"26.2.0",
"26.1.0",
"25.12.0",
"25.11.0",
"25.10.0",
"25.9.0",
"25.8.0",
"25.7.0",
"25.6.0",
"25.5.0",
"25.4.0",
"25.3.0",
"25.2.0",
"25.1.0",
"24.12.0",
"24.11.0",
"24.10.1",
"24.10.0",
"24.9.1",
"24.9.0",
"24.8.0",
"24.7.0",
"24.6.0",
"24.5.0",
"24.4.1",
"24.4.0",
"24.3.0",
"24.2.0",
"24.1.0",
"23.11.0",
"23.10.0",
"23.9.1",
"23.9.0",
"23.8.2",
"23.8.1",
"23.8.0",
"23.7.0",
"23.6.0",
"23.5.0",
"23.4.1",
"23.4.0",
"23.2.0",
"23.1.0",
"22.12.0",
"22.11.0",
"22.10.0",
"22.9.0",
"22.8.0",
"22.7.0",
"22.6.0",
"22.5.0",
"22.4.0",
"22.3.0",
"22.2.1",
"22.2.0",
"22.1.0",
"21.12.1",
"21.12.0",
"21.11.0",
"21.10.0",
"21.9.0",
"21.8.0",
"21.7.0",
"21.6.0",
"21.5.1",
"21.5.0",
"21.4.0",
"21.3.0",
"21.2.0",
"21.1.0",
"1.70.1",
"1.70.0",
"1.69",
"1.68",
"1.67",
"1.66",
"1.65",
"1.64.1",
"1.64",
"1.63",
"1.62",
"1.61",
"1.60",
"1.59",
"1.58.1",
"1.58",
"1.57",
"1.56",
"1.55",
"1.54",
"1.53.1",
"1.53",
"1.52",
"1.51",
"1.50",
"1.49",
"1.48.1",
"1.48",
"1.47",
"1.46",
"1.45",
"1.44",
"1.43",
"1.42.01",
"1.42",
"1.41",
"1.40",
"1.39",
"1.38",
"1.37",
"1.36",
"1.35",
"1.33",
"1.32",
"1.31.03",
"1.31.02",
"1.31.01",
"1.28",
"1.27",
"1.26",
"1.25",
"1.21",
"201609",
"1.20",
"20160828",
"1.19",
"201608",
"201607",
"201606",
"201605",
"201604",
"201603",
"201602",
"201601",
"201512",
"201511",
"201510",
"201509",
"201508",
"201507",
"201505",
"201506",
"0.1"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84192.json"
}
}
],
"modified": "2026-10-28T02:30:30.644653744Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84192.json",
"https://github.com/librenms/librenms/security/advisories/GHSA-7w8c-qgxg-m7jx",
"https://nvd.nist.gov/vuln/detail/CVE-2026-84192",
"https://www.vulncheck.com/advisories/librenms-before-26.3.1-stored-xss-via-snmp-syslog-data"
],
"provider_metadata": {
"cwe_ids": [
"CWE-79"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84192.json"
}
},
"related_cves": [
{
"value": "CVE-2026-84192",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 497676,
"published_at": "2026-09-01T11:33:56.451+00:00"
}