CVE-2026-26989

Published: Feb 20, 2026Modified: Feb 20, 2026

4.8

Vector

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

Exploitability: 1.7 / Impact: 2.7

Source: NVD

Description

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below are affected by a Stored Cross-Site Scripting (XSS) vulnerability in the Alert Rules workflow. An attacker with administrative privileges can inject malicious scripts that execute in the browser context of any user who accesses the Alert Rules page. This issue has been fixed in version 26.2.0.

Affected (1)

Products: Librenms: Librenms

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Librenms Librenms	Before 26.2.0

Related CWEs

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

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (4)

https://github.com/librenms/librenms/commit/087608cf9f851189847cb8e8e5ad002e59170c58

Source: security-advisories@github.com

Patch

https://github.com/librenms/librenms/pull/19039

Source: security-advisories@github.com

Issue Tracking

https://github.com/librenms/librenms/releases/tag/26.2.0

Source: security-advisories@github.com

ProductRelease Notes

https://github.com/librenms/librenms/security/advisories/GHSA-6xmx-xr9p-58p7

Source: security-advisories@github.com

ExploitThird Party Advisory

Timeline

No history available yet.