CVE-2026-26987

LibreNMS affected by reflected XSS via email field

CVSS 5.3 MEDIUMEPSS 0.3%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

20 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

librenms · librenms

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References

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