Medium severity · published Sep 1, 2026
CVE-2026-84188
librenms before 26.7.0 Stored XSS via graph_descr settings
4.8
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
before 26.7.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84188
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84188
vendor-advisory
https://github.com/librenms/librenms/security/advisories/GHSA-7cj5-v4pp-v632
third-party-advisory
https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-graph-descr-settings
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