Medium severity · published Feb 20, 2026
CVE-2026-26987
LibreNMS affected by reflected XSS via email field
6.1
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
< 26.2.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26987
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26987
Patch
https://github.com/librenms/librenms/commit/8e626b38ef92e240532cdac2ac7e38706a71208b
Issue Tracking
https://github.com/librenms/librenms/pull/19038
Product
https://github.com/librenms/librenms/releases/tag/26.2.0
Exploit
https://github.com/librenms/librenms/security/advisories/GHSA-gqx7-99jw-6fpr
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