Missing Authorization Vulnerability in LibreNMS by LibreNMS
CVE-2026-109356

5.3MEDIUM

Key Information:

Vendor

Librenms

Status
Librenms
Vendor
CVE Published:
12 October 2026

What is CVE-2026-109356?

LibreNMS, a popular open-source network monitoring tool, before version 26.9.0, suffers from a missing authorization issue in the PortsController::purge function. This vulnerability allows users with global-read access to execute DELETE requests on the /ports/purge endpoint, using the purge=all parameter to delete ports without having the necessary permissions. Consequently, attackers with read-only privileges can irreversibly clear all deleted ports across all accessible devices, posing a significant risk to data integrity and network management.

Affected Version(s)

librenms 0 < 26.9.0

librenms 26.9.0

References

https://github.com/librenms/librenms/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/librenms-before-26.9...
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.