Medium severity · published Oct 12, 2026
CVE-2026-109356
LibreNMS before 26.9.0 Missing Authorization in Port Purge via PortsController
4.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
before 26.9.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109356
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109356
vendor-advisory
https://github.com/librenms/librenms/security/advisories/GHSA-9qcg-rgg9-mpjg
third-party-advisory
https://www.vulncheck.com/advisories/librenms-before-26.9.0-missing-authorization-in-port-purge-via-portscontroller
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