Cloudanix VulnDB

CVE-2026-45694

Medium · 5.4

CVSS

5.4

EPSS

0.2%

Published

Aug 26, 2026

CISA due date

—

The record

LibreNMS is a network monitoring system. In versions up to and including 26.4.0, the Proxmox application view is vulnerable to reflected cross-site scripting through the user-supplied instance and vmid GET parameters, which are reflected into the page title without adequate encoding. The parameters are placed into the page title with only strip_tags applied, and the title is then written into an inline document.title assignment through string interpolation, so a single quote terminates the JavaScript string and the remaining input runs as script. An attacker who lures an authenticated user into following a crafted link can execute script in that user's session, enabling actions such as theft of session data. This issue is fixed in version 26.5.0.

Affected packages

Ecosystem Package Introduced Fixed

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