Vulnerability · Published Feb 20, 2026 · Assigned by GitHub_M
CVE-2026-26987LibreNMS affected by reflected XSS via email field
Medium 5.3
In plain English
A medium-severity cross-site scripting in librenms from librenms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)5.3Medium
Exploit odds (30 days)0.3%top 72.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | librenms/librenms | 26.2.0 | GHSA-gqx7-99jw-6fpr |
Affected products (as reported)
Weakness: CWE-79 · 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
References
- https://github.com/librenms/librenms/security/advisories/GHSA-gqx7-99jw-6fpr x_refsource_CONFIRM
- https://github.com/librenms/librenms/pull/19038 x_refsource_MISC
- https://github.com/librenms/librenms/commit/8e626b38ef92e240532cdac2ac7e38706a71208b x_refsource_MISC
- https://github.com/librenms/librenms/releases/tag/26.2.0 x_refsource_MISC