CVE-2026-27016

5.4 MEDIUM
Published: February 20, 2026 Modified: February 20, 2026
View on NVD

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/librenms/librenms/pull/19040
Source: security-advisories@github.com
Issue Tracking
https://github.com/librenms/librenms/releases/tag/26.2.0
Source: security-advisories@github.com
Product Release Notes
https://github.com/librenms/librenms/security/advisories/GHSA-fqx6-693c-f55g
Source: security-advisories@github.com
Third Party Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
5.4 / 10.0
EPSS (Exploit Probability)
0.0%
2th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

librenms