Cross-site scripting in LibreNMS - CVE-2026-2728
Published: May 18, 2026
Vulnerability identifier: #VU131713
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-2728
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary script code in a victim's browser.
The vulnerability exists due to cross-site scripting in the ShowConfig page when rendering the rancid_repo_url configuration value in an HTML anchor tag. A remote privileged user can inject a crafted configuration value to execute arbitrary script code in a victim's browser.
User interaction is required when a user visits the affected device configuration page.
Affected software
LibreNMS
How to mitigate CVE-2026-2728
Install security update from vendor's website.
LibreNMS - update to 26.3.0