CVE-2026-109354

EUVD-2026-97656
LibreNMS before 26.9.0 contains a path traversal vulnerability in nfsen_channel_common.inc.php that allows authenticated users to read unauthorized RRD data by injecting ../ sequences into the channel parameter. Attackers with access to one NFSen-enabled device can request graph.php with a traversed channel value to view traffic and NetFlow graphs of devices outside their authorized scope.
Path Traversal
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
VulnCheckCNA
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
librenmslibrenms
𝑥
< 26.9.0
CNA
Common Weakness Enumeration
References
https://github.com/librenms/librenms/security/advisories/GHSA-j3qf-h24w-9f42
https://www.vulncheck.com/advisories/librenms-before-26.9.0-path-traversal-via-nfsen-channel-parameter