Cross-site scripting in LibreNMS - #VU140837
Published: August 4, 2026
Vulnerability identifier: #VU140837
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: N/A
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 in the victim's browser.
The vulnerability exists due to cross-site scripting in the device showconfig page when rendering Oxidized API response fields into HTML. A remote privileged user can configure the Oxidized integration URL to an attacker-controlled server and cause crafted response fields to be stored and rendered to execute arbitrary script in the victim's browser.
User interaction is required to view a device showconfig tab, and the Oxidized integration must be enabled.
Affected software
LibreNMS
Remediation
Install security update from vendor's website.
LibreNMS - update to 26.7.0