CVE-2026-109354

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.

CVSS 4.0

5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-26)

CWE

CWE-22

Published

2026-10-12

Modified

2026-10-15

Record from

the NVD, synced 2026-10-19

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

Check your stackJSON