CVE-2026-84188CWE-79cross-site-scripting

CVE-2026-84188

Medium · published September 1, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
15.7
In the wild
Unconfirmed
What it is

LibreNMS versions <= 26.4.0 contain a stored cross-site scripting vulnerability in the graph_descr.<graphtype> configuration settings, which are echoed verbatim without HTML escaping in includes/html/pages/graphs.inc.php. An administrator can store a malicious HTML payload that executes in the browser of any authenticated user who views the affected graph type. The issue is fixed in version 26.7.0.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
4.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00251 · 15.7th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-09-01T16:17Z
References (3)
https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632 · [email protected]https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-graph-descr-settings · [email protected]https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 03 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 01 SEP 11:33Z
    librenms before 26.7.0 Stored XSS via graph_descr settings
    cvelistv5