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CVE-2026-26991

MEDIUM

4.8

Description

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the device group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a device group, an HTTP POST request is sent to the Request-URI "/device-groups". The name of the newly created device group is stored in the value of the name parameter. After the device group is created, the entry is displayed along with relevant buttons such as Rediscover Devices, Edit, and Delete. This issue has been fixed in version 26.2.0.

Details CVE

Score CVSS v3.14.8

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisHIGH

Interaction utilisateurREQUIRED

Publie2/20/2026

Derniere modification2/20/2026

Sourcenvd

Observations honeypot0

Produits affectes

librenms:librenms

Faiblesses (CWE)

CWE-79

References

https://github.com/librenms/librenms/commit/64b31da444369213eb4559ec1c304ebfaa0ba12c(security-advisories@github.com)

https://github.com/librenms/librenms/pull/19041(security-advisories@github.com)

https://github.com/librenms/librenms/releases/tag/26.2.0(security-advisories@github.com)

https://github.com/librenms/librenms/security/advisories/GHSA-5pqf-54qp-32wx(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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