Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck
CVE-2026-109355LibreNMS before 26.9.0 Stored XSS via Tools Oxidized Node List
Medium 6.1
In plain English
A medium-severity cross-site scripting in librenms from librenms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.2%top 91.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
LibreNMS before 26.9.0 contains a stored cross-site scripting vulnerability in get_oxidized_nodes_list() that renders Oxidized API fields and SNMP sysName unescaped. Attackers controlling the Oxidized response or a device's SNMP sysName can inject script that executes in browsers of users viewing the Tools Oxidized page.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- GitHub Security Advisory (GHSA-cjqw-76mh-jmpv) vendor-advisory
- VulnCheck Advisory: LibreNMS before 26.9.0 Stored XSS via Tools Oxidized Node List third-party-advisory