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    CVE-2026-26989

    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.

    Published:Feb 20, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 20, 2026
    EPSS Score:0.00003
    CVSS Score:4.3

    Affected Products

    Vendor
    Librenms
    Product
    Librenms

    Exploits

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

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High