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.
History

Fri, 20 Feb 2026 16:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

Fri, 20 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 20 Feb 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Librenms
Librenms librenms
Vendors & Products Librenms
Librenms librenms

Fri, 20 Feb 2026 02:15:00 +0000

Type Values Removed Values Added
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.
Title LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()
Weaknesses CWE-116
CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-20T01:34:11.241Z

Updated: 2026-02-20T15:34:34.942Z

Reserved: 2026-02-17T03:08:23.490Z

Link: CVE-2026-27016

cve-icon Vulnrichment

Updated: 2026-02-20T15:26:34.413Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-20T02:16:55.140

Modified: 2026-02-20T16:22:29.830

Link: CVE-2026-27016

cve-icon Redhat

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