CVE-2026-27016

Published Feb 20, 2026

Last updated a month ago

Overview

Description
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 24.10.0 through 26.1.1 are vulnerable to Stored XSS via the unit parameter in Custom OID. The Custom OID functionality lacks strip_tags() sanitization while other fields (name, oid, datatype) are sanitized. The unsanitized value is stored in the database and rendered without HTML escaping. This issue is fixed in version 26.2.0.
Source
security-advisories@github.com
NVD status
Analyzed
Products
librenms

Risk scores

CVSS 3.1

Type
Secondary
Base score
5.4
Impact score
2.7
Exploitability score
2.3
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Severity
MEDIUM

Weaknesses

security-advisories@github.com
CWE-79
nvd@nist.gov
CWE-79

Social media

Hype score
Not currently trending

Configurations