Medium severity · published Oct 12, 2026
CVE-2026-109355
LibreNMS before 26.9.0 Stored XSS via Tools Oxidized Node List
6.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
before 26.9.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109355
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109355
vendor-advisory
https://github.com/librenms/librenms/security/advisories/GHSA-cjqw-76mh-jmpv
third-party-advisory
https://www.vulncheck.com/advisories/librenms-before-26.9.0-stored-xss-via-tools-oxidized-node-list
More from librenms
9.8
CVE-2026-86426
LibreNMS before 26.8.0 Authentication Bypass via API Token Type Confusion
9.8
CVE-2022-4070
Insufficient Session Expiration in GitHub repository librenms/librenms prior to 22.10.0
9.8
CVE-2022-29712
LibreNMS v22.3.0 was discovered to contain multiple command injection vulnerabilities via the service_ip, hostname, and service_param parameters
9.8
CVE-2021-44278
Librenms 21.11.0 is affected by a path manipulation vulnerability in includes/html/pages/device/showconfig.inc.php
9.8
CVE-2019-10665
An issue was discovered in LibreNMS through 1.47