Main Vulnerability Database Vulnerabilities #VU140835

Cross-site scripting in LibreNMS - #VU140835

Published: August 4, 2026

Vulnerability identifier: #VU140835

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 a victim's browser.

The vulnerability exists due to cross-site scripting in includes/html/pages/graphs.inc.php when rendering graph description settings. A remote privileged user can store a malicious HTML payload in the graph_descr. admin configuration setting to execute arbitrary script in a victim's browser.

User interaction is required to view a graph of the affected type.

Affected software

LibreNMS

Remediation

Install security update from vendor's website.

LibreNMS - update to 26.7.0

External References

https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632

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