CVE-2026-109354 LibreNMS before 26.9.0 Path Traversal via NFSen channel Parameter
Authenticated attackers can read unauthorized RRD data from other devices by exploiting a path traversal flaw in the NFSen channel parameter.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109354?
CVE-2026-109354 is a medium-severity path traversal vulnerability in librenms, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-109354?
How do I fix CVE-2026-109354?
No fix has been published for CVE-2026-109354 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-109354 being exploited?
There is no known exploitation of CVE-2026-109354 in the wild and no public exploit code.
Sources
Also known as GHSA-hr7h-8h3p-w7rx, GHSA-j3qf-h24w-9f42.