CVE-2026-27016 — LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()
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. …
Published: 2026-02-20 · CVSS: 5.4 · CVSS 3.1
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: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7