CVE-2026-26987 PUBLISHED

LibreNMS affected by reflected XSS via email field

Assigner: GitHub_M
Reserved: 17.02.2026 Published: 20.02.2026 Updated: 20.02.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 5.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	Low
Attack Complexity	Low	Integrity	None	Integrity	Low
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	librenms
Product	librenms
Versions	Version < 26.2.0 is affected

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

Problem Types

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