CVE-2026-26987

LibreNMS affected by reflected XSS via email field

State: Published
Severity: 5.3 Medium
Published: Feb 20, 2026
Updated: Feb 20, 2026
Reserved: Feb 17, 2026

Description

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are vulnerable to Reflected XSS attacks via email field. This issue has been fixed in version 26.2.0.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
librenmslibrenms	< 26.2.0Affected

References

https://github.com/librenms/librenms/security/advisories/GHSA-gqx7-99jw-6fpr
https://github.com/librenms/librenms/pull/19038
https://github.com/librenms/librenms/commit/8e626b38ef92e240532cdac2ac7e38706a71208b
https://github.com/librenms/librenms/releases/tag/26.2.0

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