CVE-2026-84193LibreNMS through 26.2.0 Stored Cross-Site Scripting via SNMP
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.8 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 2, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
librenms librenms librenms:librenms (from the name) | through 26.2.0 | CNA record |
References
- https://github.com/librenms/librenms/security/advisories/GHSA-v5jp-f342-234hvendor-advisory
- https://www.vulncheck.com/advisories/librenms-through-26.2.0-stored-cross-site-scripting-via-snmpthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.