CVE-2026-109356 LibreNMS before 26.9.0 Missing Authorization in Port Purge via PortsController
Read-only users can delete all ports on visible devices due to missing authorization checks in the PortsController purge function.
- 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-2026-109356?
CVE-2026-109356 is a medium-severity missing authorization 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 missing authorization vulnerability in PortsController::purge that allows global-read users to physically delete ports without delete privileges. Attackers with read-only accounts can send DELETE requests to /ports/purge, using purge=all to irreversibly erase every deleted port on all visible devices.
Weakness: CWE-862
Which versions are affected by CVE-2026-109356?
How do I fix CVE-2026-109356?
No fix has been published for CVE-2026-109356 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-109356 being exploited?
There is no known exploitation of CVE-2026-109356 in the wild and no public exploit code.
Sources
Also known as GHSA-9qcg-rgg9-mpjg, GHSA-h6hv-5g7p-j2pv.