CVE-2026-27016CWE-116CWE-79

LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()

Medium · published February 20, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
27.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00354 · 27.9th percentile
Weaknesses
CWE-116 · Improper Encoding or Escaping of Output; CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-20T01:34Z
EPSS history
Timeline
  • 20 FEB 01:34Z
    LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()
    cvelistv5