CVE-2026-109355

Medium

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.

SeverityMedium

CVSS6.1

Exploit probability—

ProductLibrenms

PublishedOct 12, 2026

First seenOct 12, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

librenms librenms26.9.0 or later

Vendor advisories

github.com/librenms/librenms/security/advisories/GHSA-cjqw-76mh-jmpv

Affected products

Product	Affected versions	Fixed in
librenms librenms	v < 26.9.0	26.9.0

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